Exam 2 Flashcards
Condyle
Smooth, rounded articular process
Foramen
rounded passageway for blood vessels or nerves
Fossa
shallow depression
tuberosity
smaller, rough projection
Number of bones in axial skeleton
80
what are fontanelles?
areas of non ossified fibrous connective tissue between cranial bones
number of cervical vertebrae
7
number of thoracic vertebrae
12
Sacrum location
inferior to lumbar vertebrae
C1 name
Atlas
C2 name
Axis
C1 articulates with ___
the skull
L5 articulates with ___
Sacrum
Smallest and lightest vertebrae
Cervical
number of true rib pairs
7
number of false rib pairs
5
Floating ribs
no attachment to sternum
number of bones in appendicular skeleton
126
acetabulum
hip socket
long bone characteristics
longer than wide
long bone examples
humerus, radius, ulna
short bone characteristics
cube like, contain mostly spongy bone
short bone examples
wrist, ankle
flat bone characteristics
thin, flat, curved
flat bone examples
sternum, ribs, some skull
irregular bone characteristics
complicated shapes
irregular bone examples
vertebrae, hip bone, some skull
sutural bone characteristics
small, flat, irregular
sutural bone examples
between bones of skull
sesamoid bone characteristics
small, flat
sesamoid bone examples
patella
synovial fluid functions
lubrication, shock absorption, nutrient distribution
compact bone characteristics
homogenous, dense, smooth, made of osteons
compact bone function
resists compression and tension
spongy bone characteristics
composed of
small needle-like pieces called
trabeculae, lots of space
spongy bone functions
reduces weight of skeleton, resists force from all directions
cartilage found at the end of long bones
articular cartilage
epiphysis location
ends of long bones
diaphysis location
shaft of long bone
metaphysis function
connects diaphysis and epiphysis
endosteum
thin membrane of connective tissue that lines the inner surface of bones
periosteum
fibrous sheath that covers long bones, contains blood vessels
medullary cavity contains ___
yellow marrow in long bones
where is red marrow found in long bones?
metaphyseal and epiphyseal ends
First step of fracture healing
bleeding and clotting
second step of fracture healing
Cells of the endosteum
and periosteum divide and migrate into fracture zone, calluses stabilize break
third step of fracture healing
osteoblasts Replace central cartilage of external callus
fourth step of fracture healing
Osteoblasts and osteocytes
remodel the fracture for up to a
year
PTH ___ calcium ion levels
increases
Calcitonin ___ calcium ion levels
decreases
calcium phosphate makes up ____ of bone weight
2/3
hydroxyapatite function
strength, inflexibility
osteocyte
mature bone cell that maintains matrix
osteoblast function
secretes matrix compounds
osteoclast function
dissolve bone matrix and release stored minerals
osteoprogenitor function
divide to produce osteoblasts
Vertebral arch function
makes up vertebral canal for spinal cord
intervertebral foramen function
lateral openings between adjacent vertebrae for spinal nerves
transverse processes function
lateral projection where laminae join pedicles
Scapula articulates with ____
humerus and clavicle
humerus articulates superiorly with ___
glenoid cavity of scapula
Ulna articulates with the ___ of humerus
trochlea
Ulnar notch articulates ___
Radius with wrist and ulna
Carpus bones that articulate to form wrist joint
scaphoid and lunate
fused bones that make up pelvic girdle
ilium, ischium, pubis
Head of femur articulates with ___
acetabulum
Bones that make up the pectoral girdle
Clavicle and scapula
Epiphyseal plate function
bone growth
Movement of a synarthrosis joint
none
movement of a amphiarthrosis joint
little
movement of a diarthrosis joint
most
What is a syndesmosis?
Bones connected by ligament
What is a symphysis?
bones separated by fibrous cartilage
Articular capsule function
prevent bones from touching
What are bursae?
cushion areas where tendons or ligaments rub
tendon function
attach muscle around joint
More stable = ___ Range of motion
LESS
gliding joint function
flattened or slightly curved, limited motion
hinge joint functions
angular motion in a single plane
hinge joint examples
elbow, knee, ankle
condylar joints function
motion in two planes
condylar joint example
radiocarpal joint
C2 to L5 articulate with two types of joints
gliding and sympheseal