Skeletal System Flashcards
Skeletal System
periosteum
outermost layer of the bone, made up of fibrous tissue
Skeletal System
compact bone
dense, hard layers of bone tissue that lie underneath the periosteum
Skeletal System
cancellous (spongy) bone
contains little spaces like a sponge and is encased in the layers of compact bones
Skeletal System
endosteum
membranous lining of the hollow cavity of the bone
Skeletal System
diaphysis
shaft of the long bones
Skeletal System
epiphysis (pl. epiphyses)
end of each long bone
Skeletal System
bone marrow
material found in the cavities of the bones
Skeletal System
red marrow
thick, bloodlike material found in flat bones and the ends of long bones; location of blood cell formaiton
Skeletal System
yellow marrow
soft, fatty material found in the medullary cavity of long bones
Skeletal System
maxilla
upper jaw bone
Skeletal System
mandible
lower jaw bone
Skeletal System
vertebral column
made up of bones called vertebrae (pl) or vertebra (singular) through which the spinal cord runs. The vertebral column protects the spinal cord
Skeletal System
cervical vertebrae (C1 to C7)
first set of seven bones, froming the neck
Skeletal System
thoracic vertebrae (T1 to T12)
second set of 12 vertebrae. They articulate with the 12 pair of ribs to form the outward curve of the spin.
Skeletal System
lumbar vertebrae (L1 to L5)
third set of five larger vertebrae, which form the inward curve of the spine
Skeletal System
sacrum
next five vertebrae, which fuse together to form a triangular bone positioned between the two hip bones
Skeletal System
coccyx
four vertebrae fused together to form the tailbone
Skeletal System
lamina (pl. laminae)
part of the vertebral arch
Skeletal System
clavicle
collarbone
Skeletal System
scapula
shoulder blade
Skeletal System
acromion process
extension of the scapula, which forms the high point of the shoulder
Skeletal System
sternum
breastbone
Skeletal System
xiphoid process
lower portion of the sternum
Skeletal System
humerus
upper arm bone
Skeletal System
ulna and radius
lower arm bones
Skeletal System
olecranon process
projection at the upper end of the ulnathat forms the the bony point of the elbow
Skeletal System
carpal bones
wrist bones
Skeletal System
metacarpal bones
hand bones
Skeletal System
phalanges (sing. phalanx)
finger and toe bones
Skeletal System
pelvic bone, hip bone
made up of three bones fused together
Skeletal System
ischium
lower rear portion on which one sits
Skeletal System
ilium
upper, wing-shaped part on each side
Skeletal System
pubis
anterior portion of the pelvic bone
Skeletal System
acetabulum
large socket in the pelvic bone for the head of the femur
Skeletal System
femur
upper leg bone
Skeletal System
tibia and fibula
lower leg bones
Skeletal System
patella (pl. patellae)
kneecap
Skeletal System
tarsal bones
ankle bones
Skeletal System
calcaneus
heel bone
Skeletal System
metatarsal bones
foot bones
Skeletal System
articular cartilage
smooth layer of firm, fibrous tissue covering the contacting surface of joints
Skeletal System
meniscus
crescent-shaped cartilage found in the knee
Skeletal System
intervertebral disk
cartilaginous pad found between the vertebrae in the spine
Skeletal System
pubic symphysis
cartilaginous joint at which two pubic bones come together
Skeletal System
synovia
fluid secreted by the synovial membrane and found in joint cavities
Skeletal System
bursa (pl. bursae)
fluid-filled sac that allows for easy movement of one part of the joint or the other
Skeletal System
ligament
flexible, tough band of fibrous connective tissue that attaches one bone to another at a joint
Skeletal System
tendon
band of fibrous connective tissue that attaches muscle to bone
Skeletal System
aponeurosis
strong sheet of tissue that acts as a tendon to attach muscles to bone
Skeletal System
skeletal muscles (also known as striated muscles)
attached to bones by tendons and make body movement possible. Skeletal muscles produce action by pulling and by working in pairs. They are also called voluntary muscles because we have control over these muscles.
Skeletal System
smooth muscles (also known as unstriated muscles)
located in internal organs such as the walls of blood vessels and the digestive tract. They are also called involuntary muscles because they respond to impulses from the autonomic nerves and are not controlled voluntarily
Skeletal System
cardiac muscle (known as myocardium)
forms most of the wall of the heart. Its involuntary contraction produces the heartbeat
Skeletal System
abduction (ab-DUK-shun)
moving away from the midline
Skeletal System
adduction (ad-DUK-shun)
moving toward the midline
Skeletal System
inversion (in-VER-zhun)
turning inward
Skeletal System
eversion (e-VER-zhun)
turning outward
Skeletal System
extension (ek-STEN-shun)
movement in which a limb is placed in a straight position
Skeletal System
flexion
movement in which the limb is bent
Skeletal System
pronation
movement that turns the palm down
Skeletal System
supination
movement tha turns the palm up
Skeletal System
rotation
turning around its own axis
Skeletal System
carp/o
carpals (wrist bone)
Skeletal System
clavic/o, clavicul/o
clavicle (collarbone)
Skeletal System
cost/o
rib
Skeletal System
crani/o
cranium (skull)
Skeletal System
femor/o
femur (upper leg bone)
Skeletal System
fibul/o
fibula (lower leg bone)
Skeletal System
humer/o
humerus (upper arm bone)