Ch. 7.4 Skeletal System Key Terms
What's appendicular skeleton?
arms & the extremities and is composed of the shoulder. girdle, arm bones, pelvic girdle, and leg bones.
What's axial skeleton?
the main trunk of the body
What's Clavicles?
attached to the manubrium by ligaments.
What's Cranium?
the spherical structure that surrounds and protects the brain.
What's Endosteum?
membrane that lines the medullary canal and keeps the yellow marrow intact.
What's Epiphysis?
two extremities, or ends
What's Femur?
the smooth rounded head of the femur (upper leg bone).
What's Fibula?
slender smaller bone of the lower leg that attaches to the proximal end of the tibia
What's Fontanels?
allow for the enlargement of the skull as brain growth occurs.
What's Foramina?
openings in bones that allow nerves and blood vessels to enter or leave the bone.
Whats Joints?
areas where two or more bones join together
What's medullary canal?
a cavity in the diaphysis. It is filled with yellow marrow
What's os coxae?
pelvic girdle is made of two os coxae, coxal, or hip, bones
What's Periosteum?
The outside of bone is covered with a of tough membrane
What's Phalanges?
2 on the great toe and 3 on each of the other 4 toes
What's Radius?
lower arm on thumb side that rotates around the ulna to allow the hand to turn freely
What's red marrow?
ound in certain bones, Red bone marrow is where a process known as hematopoiesis
What's Ribs?
attached to the sternum with costal cartilages to form a "cage" that protects the heart and lungs.
What's Scapulas?
provide for attachment of the upper arm bones.
What's Sinuses?
air spaces in the bones of the skull that act as resonating chambers for the voice.
What's Sternum?
also called breastbone, is the last bone of the axial skeleton.
What's Sutures?
areas where the cranial bones have joined together
What's Tibia?
the larger weight-bearing bone of the lower leg commonly called the shin bone.
What's Ulna?
larger bone of lower arm with a projection
What's yellow marrow?
mainly a storage area for fat cells.