Ch. 8 Flashcards
206 bones
adult
axial skeleton
forms central supporting axis of body
ex. skull, vertebrae, sternum, ribs, sacrum, and hyoid
appendicular skeleton
pectoral girdle, upper appendages, pelvic girdle, lower appendages
condyle (articulation)
a rounded knob that articulates with another bone
facet (articulation)
a smooth, flat, slightly concave or convex articular surface
head (articulation)
the prominent expanded end of a bone, sometimes rounded like the head of a femur
crest
a narrow ridge (iliac crest of pelvis)
epicondyle
an expanded region superior to a condyle
line
a slightly raised, elongated ridge (nuchal lines of the skull)
process
any bony prominence (mastoid process of the skull)
protuberance
a bony outgrowth or protruding part (mental spines of the mandible)
spine
a sharp, slender, or narrow process (mental protuberance of the chin)
trochanter
two massive processes unique to the femur
tubercle
a small, rounded process (greater tubercle of the humerus)
tuberosity
a rough elevated surface (tibial tuberosity)
alveolus (depression)
a pit or socket (tooth socket)
fossa (depression)
a shallow, broad, or elongated basin (mandibular fossa)
fovea (depression)
a small pit (fovea capitis of the femur)
sulcus (depression)
a groove for a tendon, nerve, or blood vessel (intertubercular sulcus of the humerus)
canal
a tubular passage or tunnel in a bone (auditory canal of the skull)
fissure
a slit through a bone (orbital fissures behind the eye)
foramen
a hole through a bone, usually round (foramen magnum of the skull)
meatus
a canal (external acoustic meatus of the ear)
sinus
an air-filled space in a bone (frontal sinus of the forehead)
cranium
“braincase”, 8 bones fused by sutures
houses and protects the brain and associated sense organs
facial bones
anterior to the cranial cavity, shapes the face
14 bones
calvaria
skullcap, top portion of the cranium
cranial base
bottom portion of the cranium
fossa
a shallow, broad basin
3 cranial fossae fits the cerebellum and 2 cerebral lobes
parietal bones
two bones, form most of the cranial roof and part of its lateral walls
temporal lines
serve as attachment of the temporalis muscle
temporal bone
side of the skull near the ear
petrous part
part of the cranial floor, houses middle and inner ear cavities
internal acoustic meatus
opening for the vestibulocochlear nerve
jugular foramen
for jugular vein
carotid canal
for internal carotid artery
occipital bone
base of your skull by the neck
basilar part
thick median plate of occipital bone
foramen magnum
entrance for the spinal cord into cranium located in the occipital bone
occipital condyles
skull rest on vertebral column
external occipital protuberance
attachment for nuchal ligaments (binds skull to vertebral column)
superior and inferior nuchal lines
attach neck muscle
supraorbital foramen
passage for supraorbital nerve and artery
sella turcica
houses pituitary gland, part of the sphenoid bone
optic foramen
opening for optic nerve, part of the sphenoid bone
foramen rotundum
opening for the trigeminal nerve (maxillary branch), part of the sphenoid bone
foramen ovale
opening for the trigeminal nerve (mandibular branch), part of the sphenoid bone
foramen spinosum
opening for blood vessels, part of the sphenoid bone
pterygoid processes
attachment for muscles of mastication, part of the sphenoid bone
ethmoid
complex, delicate bone looks like honeycomb, lateral walls and roof of nasal cavity, and part of nasal septum
labyrinth
masses lateral to perpendicular plate; superior and middle nasal concha; ethmoidal cells make up the ethmoid sinus
crista galli
attachment of brain membranes
cribriform plate
forms roof of nasal cavity
cribriform foramina
opening for olfactory sensory nerves
fontanelle
fibrous membrane between unfused cranial bones in infants
facial bones
2 maxillae,2 nasal, 2 palatine, 2 zygomatic, 2 lacrimal, 2 inferior nasal conchae, 1 vomer, 1 mandible
infraorbital foramen
passage for blood vessels and nerves, part of the maxilla
intermaxillary suture
where two maxillae meet, part of the maxilla
palatine processes of maxilla
articulate with the palatine bones
lacrimal bone
medial wall of orbit, where tear duct would be
lacrimal fossa
depression for sac that collects tears from eyes (drains into nasal cavity)
perpendicular plate of palantine bone
extends to form part of the orbit
horizontal plate
forms hard palate with maxilla
cleft palate
2 maxillae dont meet
mandible
strongest bone of skull, only movable skull joint, consists of body, angle, ramus
mental protuberance
chin
alveolar process
holds teeth
coronoid process
chewing muscle attachment
nasal bones
bridge of the nose, supports nasal cartilages
inferior nasal concha
separate bone
vomer
forms inferior part of bony nasal septum, connects to the ethmoid perpendicular plate
cribriform plate of ethmoid
forms roof of nasal cavity
cribriform foramina
passageway for olfactory
paranasal sinuses
chambers within bones; air-filled and lined by mucous membrane
hyoid bone
slender U- shaped bone between the chin and larynx
Vertebral column
supports the skull and trunk, allows for their moment
vertabral canal
“tunnel” formed by vertebral foramina of all vertebrae, spinal cord runs through it
5 vertebral groups
cervical, thoracic, lumbar, sacral, coccygeal
How many cervical?
7
How many thoracic?
12
How many lumbar?
5
axis vertebra
rotate your head
intervertebral disc
pad between bodies of vertebrae, absorb shock, supports body weight
herniated disc/ruptured/slipped disc
annulus (outer ring of touch fibrocartilage can crack under heavy stress
scoliosis
abnormal lateral curvature
hyperkyphosis
exaggerated thoracic curvature
hyperlordosis
exaggerated lumbar curvature
true rib
attached to sternum by individual costal cartilage
false rib
attached to sternum by shared costal cartilage
floating rib
not attached to sternum at all
brachium
extends from shoulder to elbow, only humerus
antebrachium
extends from elbow to wrist, forearm which is radius and ulna
carpus
wrist, 8 carpals
manus
hand, 5 metacarpals, 14 phalanges
femoral region
thigh, extends from hip to knee, femur and patella
crural region
leg, tibia, fibula
tarsal region
ankle
pedal region
7 tarsal bones, 5 metatarsals, 14 phalanges