calcaneus : The part of the heel you stand on.

cardiovascular disease: Diseases of the heart and blood vessels.

cartilaginous joints: The joint surfaces in cartilaginous joints are covered with hyaline cartilage and have fibrocartilaginous discs between them. Like fibrous joints, cartilaginous joints can be immoveable.

cerebrum : The largest part of the brain; made up of the left and right cerebral hemispheres.

cervical: The neck region; starts below the head, ends at the thorax, and is visible from the front and rear from below the head to the shoulders.

circumduction: To move in a circular motion; doing arm circles, is circumduction.

condyloid joints : Joints with an oval surface on one bone that articulates with an oval-shaped depression in another bone. The metacarpophalangeal joints in the fingers are examples of condyloid joints.

contralateral: On opposite sides of the body. The right ear is contralateral to the left ear.

corpus callosum: A band of nerve fibers that allows the sides of the brain to communicate with the other.

cranium : The skull.