Chapter 6 & 7 Flashcards
1
Q
Ligaments
A
strong bands of fibrous connective tissue that attach to
bones and hold them together. bones-bones
2
Q
tendons
A
strong bands of connective tissue that attach skeletal muscles to bones; muscles-bones
3
Q
chondroblasts
A
Hyaline cartilage consists of these specialized cartilage producing cells
4
Q
chondrocyte
A
When matrix surrounds a chondroblast, it becomes this rounded cell that occupies a space called a lacuna within the matrix.
5
Q
perichondrium
A
double-layered connective tissue sheath covering most cartilage
6
Q
Articular cartilage
A
cartilage covering the ends of bones where they come together to form joints, has no perichondrium, blood vessels, or nerves.
7
Q
appositional growth
A
chondroblasts in the perichondrium add new cartilage to the outside edge of the existing cartilage.
8
Q
interstitial growth
A
chondrocytes within the tissue divide and add more matrix between the existing cells
9
Q
hydroxyapatite
A
The inorganic material within the bone matrix that consists
primarily of a calcium phosphate crystal
10
Q
Osteoblasts
A
bone-forming cells that have an extensive endoplasmic reticulum and numerous ribosomes.
11
Q
matrix vesicles
A
Osteoblasts also release these membrane-bound sacs formed when the plasma membrane buds, or protrudes outward, and pinches off.
12
Q
Ossification or osteogenesis
A
formation of bone by osteoblasts.
13
Q
osteocyte
A
Once an osteoblast becomes surrounded by bone matrix,
14
Q
lacunae
A
The spaces occupied by the osteocyte cell bodies
15
Q
canaliculi
A
the spaces occupied by the osteocyte cell processes
16
Q
Osteoclasts
A
responsible for the reabsorption, or breakdown, of bone.
17
Q
ruffled border
A
Where the plasma membrane of osteoclasts contacts bone matrix and forms many projections
18
Q
stem cells
A
Some of the mesenchymal cells become stem cells, which can replicate and give rise to more specialized cell types.
19
Q
Osteochondral progenitor cells
A
stem cells that can become osteoblasts or chondroblasts.
20
Q
Osteogenesis imperfecta
A
also known as brittle bone disorder. This connective tissue disease is caused by a gene mutation that leads to the production of less collagen than normal or collagen that is abnormal in structure.
21
Q
woven bone
A
collagen fibers are randomly oriented in many directions; first formed during fetal development or during the repair of a fracture.
22
Q
bone remodeling
A
The process of removing old bone and adding new bone
23
Q
Lamellar bone
A
mature bone that is organized into thin sheets or layers called lamellae
24
Q
spongy bone
A
consists of interconnecting rods or plates of bone called trabeculae; Between the trabeculae are spaces that, in life, are filled with bone marrow and blood vessels.
25
Compact bone
denser and has fewer spaces than spongy bone
26
central canals
contain vessels that run parallel to the long axis
of the bone; lined with endosteum and contain blood
vessels, nerves, and loose connective tissue.
27
Concentric lamellae
circular layers of bone matrix that surround a common center, the central canal.
28
osteon or haversian system
consists of a single central canal, its contents, and associated concentric lamellae and osteocytes.
29
circumferential lamellae
forms the outer surfaces of compact bone; thin plates that extend around the bone
30
interstitial lamellae
Between the osteons; remnants of concentric or circumferential lamellae that were partially removed during bone remodeling.
31
perforating canals
how blood vessels from the periosteum or medullary cavity enter the bone; run perpendicular to the long axis of the bone
32
Long bones
longer than they are wide. Most of the bones of the upper and lower limbs are long bones.
33
Short bones
round or nearly cube-shaped; bones of the wrist (carpal bones) and ankle (tarsal bones).
34
Flat bones
have a relatively thin, flattened shape and are usually curved; certain skull bones, the ribs, the breastbone (sternum), and the shoulder blades (scapulae).
35
Irregular bones
vertebrae and facial bones; have shapes that do not fit readily into the other three categories.
36
diaphysis or shaft
composed primarily of compact bone, but it can also contain some spongy bone.
37
articular cartilage
Within joints, the end of a long bone is covered with this hyaline cartilage
38
epiphysis
part of a long bone that develops from a center of ossification distinct from that of the diaphysis.
39
Epiphyseal plate
growth plate; Area of hyaline cartilage between the diaphysis and epiphysis; cartilage growth followed by endochondral ossification results in growth in bone length
40
epiphyseal line
When bone stops growing in length, the epiphyseal plate becomes ossified and is called the epiphyseal line
41
Medullary cavity
Large cavity within the diaphysis
42
Periosteum
Double-layered connective tissue membrane covering the outer surface of bone except where articular cartilage is present; ligaments and tendons attach to bone through the periosteum; blood vessels and nerves from the periosteum
supply the bone; the periosteum is where bone grows in diameter
43
perforating fibers or Sharpey fibers
bundles of collagen fibers that strengthen the attachment of the tendons or ligaments to the bone.
44
Endosteum
Thin connective tissue membrane lining the inner cavities of bone
45
sinuses
air-filled spaces some of the flat and irregular bones of the skull have, which are lined by mucous membranes.
46
intramembranous ossification and endochondral ossification
During fetal development, bone forms in these two patterns which initially produce woven bone, that is
then remodeled and they both look the same: intramembranous ossification (takes place in connective
tissue membranes) and endochondral ossification (takes place in cartilage)
47
centers of ossification
The locations in the membrane where ossification begins
48
fontanels or soft spots
The larger, membrane-covered spaces between the developing skull bones that have not yet been ossified
49
hyaline cartilage model
what the chondroblasts produce as a map of the approximate shape of the bone that will later be formed
50
bone collar
when the osteoblasts produce compact bone on the surface of the cartilage model
51
hypertrophy
enlarge
52
calcified cartilage
when the chondrocytes release matrix vesicles, which initiate the formation of hydroxyapatite crystals in the cartilage matrix.
53
primary ossification center
area of diaphysis bone formation where the osteoblasts produce bone on the surface of the calcified cartilage, forming bone trabeculae, which changes the calcified
cartilage of the diaphysis into spongy bone.
54
secondary ossification centers
additional sites of ossification that appear in the epiphyses
55
zone of resting cartilage
nearest the epiphysis and contains randomly arranged
| chondrocytes that do not divide rapidly.
56
zone of proliferation
The chondrocytes here produce new cartilage through interstitial cartilage growth.
57
zone of hypertrophy
here the chondrocytes produced in the zone of proliferation mature and enlarge.
58
zone of calcification
very thin and contains hypertrophied chondrocytes and calcified cartilage matrix. The hypertrophied chondrocytes die, and blood vessels from the diaphysis grow into the area.
59
rickets
Insufficient vitamin D in children causes this disease resulting from reduced mineralization of the bone matrix.
60
“adult rickets” or osteomalacia
softening of the bones as a result of calcium depletion.
61
Vitamin C
necessary for collagen synthesis by osteoblasts. In
| children, vitamin C deficiency can retard growth.
62
scurvy
In both children and adults, vitamin C deficiency can result in scurvy, which is marked by ulceration and hemorrhage in almost any area of the body because normal collagen synthesis is not occurring in connective tissues.
63
Growth hormone
from the anterior pituitary increases general tissue growth, including overall bone growth, by stimulating interstitial cartilage growth and appositional bone growth.
64
Thyroid hormone
also required for normal growth of all tissues, including cartilage; therefore, a decrease in this hormone can result in a smaller individual.
65
Sex hormones
also influence bone growth. Estrogen and testosterone initially stimulate bone growth, which accounts for the burst of growth at puberty, when production of these hormones increases.
66
bone remodeling
when bone that becomes old is replaced with new bone
67
basic multicellular unit (BMU)
a temporary assembly of osteoclasts and osteoblasts that travels through or across the surface of bone, removing old bone matrix and replacing it with new bone matrix.
68
hematoma
localized mass of blood released from blood vessels but confined within an organ or a space.
69
callus
mass of tissue that forms at a fracture site and connects the broken ends of the bone.
70
internal callus
forms between the ends of the broken bone, as well as in the marrow cavity if the fracture occurs in the diaphysis of a long bone.
71
external callus
forms a collar around the opposing ends of the bone fragments.
72
Parathyroid hormone (PTH)
major regulator of blood Ca 2+ levels. PTH, secreted from the parathyroid glands when blood Ca 2+ levels are too
low, stimulates an increase in the number of osteoclasts, which break down bone and elevate blood Ca 2 + levels
73
receptor for activation of nuclear factor kappaB ligand (RANKL)
When PTH binds to these receptors, these cells respond by producing this
74
receptor for activation of nuclear factor kappaB (RANK)
RANKL is expressed on the surface of the osteoblasts and stem cells and can combine with RANK found on
the cell surfaces of osteoclast precursor cells.
75
osteoprotegerin (OPG)
Osteoclast production is inhibited by OPG, which is secreted by osteoblasts and stem cells.
76
Calcitonin
secreted from the thyroid gland when blood Ca 2+ levels are too high, decreases osteoclast activity by binding to receptors on the osteoclasts.
77
open fracture (compound)
occurs when an open wound extends to the site of the
| fracture or when a fragment of bone protrudes through the skin.
78
closed fracture (simple)
If the skin is not perforated in a fracture
79
complicated fracture
If the soft tissues around a closed fracture are damaged
80
incomplete fracture
does not extend completely across the bone
81
complete fracture
the bone is broken into at least two fragments.
82
greenstick fracture
An incomplete fracture that occurs on the convex side of the curve of the bone
83
Hairline fractures
incomplete fractures in which the two sections of bone do not separate; common in the skull.
84
comminuted fracture
complete fracture in which the bone breaks into more than two pieces—usually two major fragments and a smaller fragment.
85
impacted fracture
one fragment is driven into the spongy portion of the other
| fragment.
86
Linear fractures
run parallel to the long axis of the bone
87
transverse fractures
right angles to the long axis.
88
Spiral fractures
take a helical course around the bone
89
oblique fractures
run obliquely in relation to the long axis
90
Dentate fractures
have rough, toothed, broken ends
91
stellate fractures
have breakage lines radiating from a central point.
92
hormone replacement therapy (HRT)
decreases osteoclast numbers by inhibiting the production of RANKL
93
Statins
drugs that inhibit cholesterol synthesis; they also stimulate osteoblast activity
94
bisphosphonates
concentrate in bone.
95
tubercle or process
If a bone possesses a tubercle (lump) or a process (projection), most likely a ligament or tendon was attached to that tubercle or process during life.
96
foramen
If the bone has a foramen in it, that foramen was
| the opening through which a nerve or blood vessel passed.
97
sinuses
mucous membrane–lined air spaces that some skull bones contain
98
axial skeleton
composed of the skull, auditory ossicles, hyoid bone, vertebral column, and rib cage, or thoracic cage.
99
skull or cranium
protects the brain; supports the organs of vision, hearing, smell, and taste; and provides a foundation for the structures that take air, food, and water into the body.
100
calvaria or skullcap
The top of the skull
101
parietal bones
The paired parietal bones are joined at the midline by the sagittal suture
102
frontal bone
the parietal bones are connected to the frontal bone by the coronal suture
103
occipital bone
The parietal bones are joined to the occipital bone by the lambdoid suture .
104
sutural bones
extra small bones that form along the lambdoid suture.
105
external occipital protuberance
present on the posterior surface of the occipital bone
106
ligamentum nuchae
an elastic ligament that extends down the neck and helps
| keep the head erect by pulling on the occipital region of the skull.
107
Nuchal lines
a set of small ridges that extend laterally from the protuberance and are the points of attachment for several neck muscles.
108
squamous suture
joins the parietal bone and the squamous part of the temporal bone
109
external auditory canal (or external acoustic meatus)
A prominent feature of the temporal bone is this large hole, which transmits sound waves toward the tympanic membrane
110
mastoid process
Just posterior and inferior to the external auditory canal is this large inferior projection
111
mastoid air cells
The process is not solid bone but is filled with these cavities, which are connected to the middle ear.
112
temporal lines
superior and inferior temporal lines, which are attachment points of the temporalis muscle, one of the major muscles of mastication, arch across the lateral surface of the parietal bone.
113
sphenoid bone
the lateral surface of the greater wing of the sphenoid bone is immediately anterior to the temporal bone
114
zygomatic bone
Anterior to the sphenoid bone; cheekbone
115
zygomatic arch
consists of joined processes from the temporal and zygomatic bones, forms a bridge across the side of the skull
116
maxilla
upper jaw; is anterior and inferior to the zygomatic bone to which it is joined.
117
mandible
lower jaw; is inferior to the maxilla and articulates posteriorly with the temporal bone; consists of 2 main regions: body, which extends anteroposteriorly, and the
ramus (branch), which extends superiorly from the body toward the temporal bone.
118
The superior end of the ramus has:
a mandibular condyle, which articulates with the mandibular fossa of the temporal bone, and the coronoid process, to which the powerful temporalis muscle, one of the chewing muscles, attaches.
119
orbits
the most prominent openings into the skull are the orbits and the nasal cavity. Each of the two orbits is a cone-shaped fossa with its apex directed posteriorly
120
nasolacrimal canal
holds the nasolacrimal duct that passes from the orbit into the nasal cavity, carrying tears from the eyes to the nasal cavity.
121
optic canal
The optic nerve for vision passes from the eye through the
| optic canal at the posterior apex of the orbit and enters the cranial cavity.
122
nasal cavity
has a pear-shaped opening anteriorly and is divided into right and left halves by a nasal septum
123
nasal septum
consists primarily of the vomer and the perpendicular plate of the ethmoid bone. Hyaline cartilage forms the anterior
part of the nasal septum.
124
nasal conchae
three bony shelves on the lateral wall of the nasal cavity, which are directed inferiorly
125
paranasal sinuses
large cavities within several of the bones associated with the nasal cavity, which open into the nasal cavity; decrease the weight of the skull and act as resonating chambers during voice production.
126
cranial cavity
skull cavity occupied by the brain.
127
crista galli
A prominent ridge located in the center of the anterior fossa; point of attachment for one of the meninges, the dura mater, a thick connective tissue membrane that supports and protects the brain
128
cribriform plate
plate of the ethmoid bone forms the floor of each olfactory fossa.
129
olfactory foramina
sievelike perforations in the cribriform plate through which the olfactory nerves extend from the cranial cavity into the roof of the nasal cavity
130
sella turcica
central prominence located within the floor of the cranial cavity that resembles a saddle, the body of the sphenoid bone forms it; occupied by the pituitary gland.
131
anterior cranial fossa and middle cranial fossa
The lesser wings of the sphenoid bone form a ridge to
| each side of the optic canals. This ridge separates the anterior cranial fossa from the middle cranial fossa.
132
petrous portion
portion of the temporal bone extends posterolaterally from each side of the sella turcica; thick, bony ridge is hollow and contains the middle and inner ears.
133
posterior cranial fossa
The petrous portion separates the middle cranial fossa from the posterior cranial fossa.
134
Several important openings in the floor of the middle cranial fossa:
superior orbital fissure, the foramen rotundum, the foramen ovale, the foramen spinosum, and the internal opening
of the carotid canal
135
foramen lacerum
in the floor of the carotid canal, is an artifact of the dried skull; filled with cartilage.
136
foramen magnum
through which the brain is connected to the spinal cord, is in the posterior fossa
137
hypoglossal canal
located on the anterolateral sides of the foramen magnum
138
Jugular foramina
lie on each side of the foramen magnum near the base of the petrous portion.
139
internal auditory canal
located about midway up the face of each petrous portion
140
Occipital condyles
smooth points of articulation between the skull and the vertebral column, lie on the lateral and anterior margins of the foramen magnum.
141
carotid canals
through which blood reaches the brain by way of
| the internal carotid arteries
142
styloid processes
Two long, pointed projections that project from the floor of the temporal bone
143
mandibular fossa
where the mandible articulates with the rest of the skull, is anterior to the mastoid process at the base of the zygomatic arch.
144
medial pterygoid plate and the lateral pterygoid plate
The posterior opening of the nasal cavity is bounded on each side by these vertical bony plates of the sphenoid bone
145
vomer
forms most of the posterior portion of the nasal septum and can be seen between the medial pterygoid plates in the center of the nasal cavity.
146
hard palate or bony palate
forms the floor of the nasal cavity.
147
auditory ossicles
the skull contains six which function in hearing
148
braincase or neurocranium
consists of 8 bones that immediately surround and protect the brain.
149
cleft lip
results if the maxillae do not form normally
150
cleft palate
occurs when the palatine processes of the maxillae do not fuse with one another
151
facial bones or viscerocranium
form the structure of the face in the anterior skull.
152
alveolar processes
jaws possess alveolar processes with sockets for the attachment of the teeth.
153
hyoid bone
is unpaired, is often listed as part of the facial bones because it has a common developmental origin with them.
154
body
bony disk that's the weight-bearing portion of the vertebra
155
vertebral arch
projects posteriorly from the body
156
The vertebral arch is divided into left and right halves, and each half has two parts
pedicle, which is attached to the body, and the lamina, which joins with the lamina from the opposite half of the arch.
157
vertebral foramen
vertebral arch and the posterior part of the body surround this large opening
158
vertebral canal
The vertebral foramina of adjacent vertebrae combine to
| form the vertebral canal, which contains the spinal cord or cauda equina
159
transverse process
extends laterally from each side of the arch between the lamina and the pedicle
160
spinous process
a single spinous process lies at the junction between the two laminae
161
intervertebral foramina
Spinal nerves exit the spinal cord through this
162
intervertebral notches
Each intervertebral foramen is formed by these in the pedicles of adjacent vertebrae.
163
Lordosis
hollow back; an exaggeration of the convex curve of the lumbar region.
164
Kyphosis
hump back; an exaggeration of the concave curve of the thoracic region.
165
Scoliosis
an abnormal lateral and rotational curvature of the vertebral column, which is often accompanied by secondary abnormal curvatures
166
spina bifida
when vertebral laminae partly or completely fail to fuse
| (or even fail to form) during fetal development
167
articular facet
The region of overlap and articulation between the superior and inferior articular processes creates a smooth articular facet on each articular process.
168
intervertebral disks of fibrocartilage
located between the bodies of adjacent vertebrae; provide additional support and prevent the vertebral bodies from rubbing against each other.
169
external annulus fibrosus
The intervertebral disks consist of an external annulus fibrosus and an internal, gelatinous nucleus pulposus
170
cervical vertebrae
have very small bodies; most have bifid spinous processes and a transverse foramen in each transverse process through which the vertebral arteries extend toward the head.
171
herniated disk (or ruptured disk)
results when the annulus fibrosus breaks or balloons, releasing all or part of the nucleus pulposus
172
laminectomy
removal of a vertebral lamina, or vertebral arch.
173
hemilaminectomy
removal of a portion of a vertebral lamina.
174
Fenestration
involves removal of the nucleus pulposus, leaving the
| annulus fibrosus intact.
175
atlas
first cervical vertebra; holds up the head
176
axis
second cervical vertebra; a considerable amount of rotation occurs at this vertebra to produce a “no” motion of the head.
177
dens or odontoid process.
axis has this highly modified process on the superior side of its small body
178
vertebral prominens
most prominent spinous process near 7th vertebra
179
Whiplash
traumatic hyperextension of the cervical vertebrae.
180
thoracic vertebrae
possess long, thin spinous processes directed inferiorly, and they have relatively long transverse processes.
181
lumbar vertebrae
have large, thick bodies and heavy, rectangular transverse and spinous processes.
182
sacral vertebrae
highly modified compared with the others.
183
sacrum
five sacral vertebrae are fused into this single bone
184
alae
wing-shaped areas that are superior surfaces of the lateral parts
185
auricular surfaces
Much of the lateral surfaces of the sacrum; ear-shaped; join the sacrum to the pelvic bones.
186
median sacral crest
The spinous processes of the first four sacral vertebrae partially fuse to form the median sacral crest along the dorsal surface of the sacrum.
187
sacral hiatus
spinous process of the fifth vertebra does not form, thereby leaving a sacral hiatus at the inferior end of the sacrum, which is often the site of anesthetic injections.
188
sacral foramina
The intervertebral foramina are divided into these anterior and posterior foramina, which are lateral to the midline.
189
Transverse lines
where the individual sacral vertebrae fuse
190
sacral promontory
anterior edge of the body of the first sacral vertebra bulges to form this, a landmark that separates the abdominal cavity from the pelvic cavity.
191
coccyx or tailbone
most inferior portion of the vertebral column and usually
| consists of three to five semifused vertebrae that form a triangle, with the apex directed inferiorly.
192
rib cage or thoracic cage
protects the vital organs within the thorax and forms a semirigid chamber that can increase and decrease in volume during respiration.
193
ribs
12 pairs; classified as either true ribs or false ribs.
194
true ribs
superior 7 pairs are called true ribs or vertebrosternal ribs; they articulate with the thoracic vertebrae and attach directly through their costal cartilages to the sternum.
195
false ribs
inferior 5 pairs articulate with the thoracic vertebrae but do
not attach directly to the sternum.
196
vertebrochondral ribs
joined by a common cartilage to the costal cartilage of the seventh rib, which in turn is attached to the sternum.
197
floating ribs or vertebral ribs
Two of the false ribs, the eleventh and twelfth ribs; do not attach to the sternum.
198
separated rib
a dislocation between a rib and its costal cartilage that allows the rib to move, override adjacent ribs, and cause pain.
199
cervical ribs
transverse processes of the seventh cervical vertebra form these separate bones
200
sternum or breastbone
sword-shaped and has three parts: manubrium is the sword handle; the body, or gladiolus (sword), is the blade; and the xiphoid process is the sword tip.
201
jugular notch or suprasternal notch
v at bottom of throat; within superior margin of the manubrium in the midline, which can be easily felt at the anterior base of the neck
202
sternal angle
point at which the manubrium joins the body of the sternum can be felt as a prominence on the anterior thorax
203
appendicular skeleton
consists of the bones of the upper limbs, the lower limbs, and the girdles.
204
pectoral girdle or shoulder girdle
consists of two pairs of bones that attach the upper limb to the body: Each pair is composed of a scapula or shoulder blade and a clavicle or collarbone
205
scapular spine
extends from the acromion process across the posterior surface of the scapula and divides that surface into a small supraspinous fossa superior to the spine and a larger infraspinous fossa inferior to the spine.
206
subscapular fossa
deep, anterior surface of the scapula
207
coracoid process
provides attachments for some shoulder and arm muscles.
208
glenoid cavity
located in the superior lateral portion of the bone, articulates with the head of the humerus.
209
humerus
The arm, the part of the upper limb from the shoulder to the elbow, contains only one bone, the humerus
210
humeral head
articulates with the glenoid cavity of the scapula.
211
anatomical neck
immediately distal to the head, is almost nonexistent; thus,
a surgical neck has been designated.
212
surgical neck
common fracture site that often requires surgical repair.
213
greater tubercle and the lesser tubercle
greater tubercle is on the lateral surface, and the lesser tubercle is on the anterior surface of the proximal end of the humerus, where both are sites of muscle attachment.
214
intertubercular groove or bicipital groove
groove between the two tubercles contains one tendon of the biceps brachii muscle
215
deltoid tuberosity
located on the lateral surface of the humerus a little more than a third of the way along its length and is the attachment site for the deltoid muscle.
216
capitulum
lateral portion of the articular surface is very rounded, articulates with the radius
217
trochlea
medial portion somewhat resembles a spool or pulley, articulates with the ulna
218
medial and lateral epicondyles
Proximal to the capitulum and the trochlea; points of attachment for the muscles of the forearm.
219
ulna
on the medial side of the forearm, the side with the little finger.
220
radius
on the lateral, or thumb, side of the forearm
221
trochlear notch
proximal end of the ulna has a C-shaped articular surface, that fits over the trochlea of the humerus.
222
olecranon process
larger, posterior process
223
coronoid process
smaller, anterior process
224
ulna head
distal end of the ulna has a small head, which articulates with both the radius and the wrist bones
225
ulna styloid process
to which ligaments of the wrist are attached
226
radial notch
lateral surfaces of the head constitute a smooth cylinder, where the radius rotates against the radial notch of the ulna
227
radial tuberosity
the point at which a major anterior arm muscle, the biceps brachii, attaches.
228
styloid process
to which wrist ligaments are attached is located on the
| lateral side of the distal radius.
229
carpal bones
The wrist is a relatively short region between the forearm and the hand; it is composed of 8 carpal bones
230
carpal tunnel
A ligament stretches across the wrist from the tubercle of the trapezium to the hook of the hamate to form a tunnel on the anterior surface of the wrist
231
sesamoid bones
One or two sesamoid bones often form near the junction between the proximal phalanx and the metacarpal bone of the thumb.
232
pelvic girdle
The right and left coxal bones join each other anteriorly and the sacrum posteriorly to form a ring of bone called the pelvic girdle.
233
pelvis
includes the pelvic girdle and the coccyx
234
obturator foramen
Each coxal bone consists of a large, concave bony plate superiorly, a slightly narrower region in the center, and an expanded bony ring inferiorly, which surrounds a large obturator foramen.
235
acetabulum
A fossa called the acetabulum is located on the lateral surface of each coxal bone and is the point where the lower limb articulates with the girdle.
236
Each coxal bone is formed by the fusion of three bones:
ilium, ischium, and pubis
237
iliac crest
superior portion of the ilium
238
greater sciatic notch
on the posterior side of the ilium, just inferior to the posterior inferior iliac spine.
239
sacroiliac joint
auricular surface of the ilium joins the sacrum to form the sacroiliac joint
240
iliac fossa
medial side of the ilium consists of this large depression
241
ischial tuberosity
where posterior thigh muscles attach and on which a person sits
242
pubic crest
where abdominal muscles attach
243
pubic tubercle
where the inguinal ligament attaches
244
symphysis pubis or pubic symphysis
Just inferior to the pubic crest is the point of junction between the two coxal bones
245
The pelvis is subdivided into a true pelvis and a false pelvis:
The opening to the true pelvis is the pelvic inlet and inferior opening of the true pelvis is the pelvic outlet. The false pelvis is formed by muscle overlying bone of the true pelvis.
246
femur
single bone in the thigh
247
The proximal shaft exhibits two projections:
greater trochanter lateral to the neck and a smaller, lesser trochanter inferior and posterior to the neck.
248
distal end of the femur has medial
| and lateral condyles
smooth, rounded surfaces that articulate with the tibia.
249
medial and lateral epicondyles
Located proximally to the condyles; important sites of ligament attachment.
250
adductor tubercle
to which muscles attach, is located just proximal to the medial epicondyle.
251
lower leg consists of two bones
tibia, or shinbone, and fibula
252
tibial tuberosity
which is the attachment point for the quadriceps femoris muscle group, can easily be seen and felt just inferior to the patella
253
anterior crest
forms the shin.
254
medial and lateral condyles
proximal end of the tibia; which articulate with the condyles of the femur.
255
intercondylar eminence
Located between the condyles; a ridge between the two articular surfaces of the proximal tibia.
256
medial malleolus
distal end of the tibia is enlarged to form the medial malleolus, which helps form the medial side of the ankle joint.
257
lateral malleolus
distal end of the fibula is also slightly enlarged as the lateral malleolus to create the lateral wall of the ankle joint.
258
foot
has seven tarsal bones; talus (ankle bone), calcaneus (heel bone) largest and strongest in foot; navicular; No Thanks Cow
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three medial, wedge-shaped bones in foot:
medial cuneiform, intermediate cuneiform, and lateral cuneiform, collectively called the cuneiforms
260
cuboid
cube-shaped, is the most lateral of the distal row.
261
three major foot arches:
medial longitudinal arch, the lateral longitudiual arch, and the transverse arch
262
eversion
turning the plantar surface of the foot (the sole) outward so that it faces laterally
263
inversion
Turning the plantar surface of the foot inward so that it faces medially
