Ch. 7.4 Skeletal System Key Terms
the long shaft of the bone
What is the diaphysis?
the main trunk of the body
What is the axial skeleton?
openings in bones that allow nerves and blood vessels to enter or leave the bone
What are formina?
shoulder bones, two make up the shoulder girdle, provides attachment for the upper arm bones
What are scapulas?
3 make up the finger and 2 make up the thumb
What are the phalanges?
a membrane that lines the medullary canal and keeps the yellow marrow intact
What is the endosteum?
forms the extremities; composed of the shoulder girdle, arm bones, pelvic girdle, and leg bones
What is the appendicular skeleton?
protect the spinal cord and provide support for the head and neck
What are vertebrae?
lower arm on thumb side that allows the ulna to allow the hand to move freely
What is the radius?
larger weight-bearing bone that makes up the shin
What is the tibia?
the extremities(ends) of the bones
What is the epiphysis?
the spherical structure that surrounds and protects the brain
What is the cranium?
12 pairs, attach to the thoracic vertebrae on the dorsal surface of the body
What are ribs?
larger bone of lower arm with a projection called the olecranon process at its upper end, forming the elbow
What is the ulna?
air spaces in the bones of the skull that act as resonating chambers for the voice
What are the sinuses?
a cavity in the diaphysis
What is the medullary canal?
“soft spots”, allows for the enlargement of the skull as brain growth occurs
What are fontanels?
breastbone, last bone of the axial skeleton
What is the sternum?
make up the wrist
What are carpals?
the slender, smaller bone of the lower leg that attaches to the proximal end of the tibia
What is the fibula?
a body system made of organs called “bones”
What is the skeletal system?
areas where the cranial bones have joined together
What are sutures?
collarbones, two make up the shoulder girdle
What are clavicles?
make up the palm of the hand
What are the metacarpals?
areas where two or more bones join together