Ch. 7.4 Skeletal System Key Terms
appendicular skeleton
forms the extremities and is composed of the shoulder girdle, arm bones, pelvic girdle, and leg bones.
endosteum
a membrane that kee[ps the yellow marrow intact
humerus
upper arm
periosteum
a tough membrane (that) covers the outside of bone.
sternum
breastbone
axial skeleton
forms the main trunk of the body and is composed of the skull, spinal column, ribs, and breastbone.
epiphysis
the two extremities, or ends (of a long bone)
medullary canal
cavity in the diaphysis-(long shaft)
phalanges
sutures
where bones are held together
carpals
wrist
fibula
the slender smaller bone of the lower leg
metacarpals
palm
radius
lower arm on thumb side that rotates around the ulna to allow the hand to turn freely.
tarsals
ankle
clavicles
collarbones
fontanels
spaces that allow the skull to grow
metatarsals
instep of the foot
Red marrow
found in certian bones, produces red blood cells, platlets, and white blood cells
tibia/ulna
larger bone of the lower leg/larger bone of the lower arm
diaphysis
long shaft
foramina
openings in bones that allow nerves and blood vessels to enter or leave the bone
os coxae
hip bones
scapulas
shoulder bones
yellow marrow
is mainly a storage area for fat cells, also contains cells that form leukocytes, or white blood cells.