CH.07.4 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 lines the medullary canal and keeps the yellow marrow intact
foramina
openings in bones that allow nerves and blood vessels to enter or leave the bone
metacarpals
palm of the hand
phalanges
2 on the great toe and 3 on each of the other 4 toes
axial skeleton
forms the main trunk of the body and is composed of the skull, spinal columns, ribs, and breastbone
epiphysis
the two extremities or ends
humerus
in your upper arm from the shoulder to the elbow
metatarsals
radius
lower arm on thumb side that rotates around the ulna to allow the hand to turn freely
carpals
wrist
femur
thigh
areas where two or more bones join together
os coxae
the pelvic bone
red marrow
found in certain bones. A process of hematopoiesis takes place here.
clavicles
collarbones
fibula
the slender, small bone of the lower leg that attaches to the proximal end of the tibia
ligaments
connective tissue bands that help hold long bones together at joints
patella
kneecap
ribs
they attach to the thoracic vertebrae on the dorsal surface of the body.
diaphysis
the long shaft
fontanels
soft spots that allow for the enlargement of the skull as brain growth occurs
medullary canal
a cavity in the diaphysis
periosteum
contains blood vessels, lymph vessels, and osteoblasts, which is the outside of the bone covered with a tough membrane
scapulas
shoulder bones