ANATOMY

Detailed explanation-1: -The appendicular skeleton consists of a total of 126 bones. It includes the bones of the four limbs, shoulder girdle, and pelvic girdle. Each upper limb consists of 30 bones. There is one bone (called the humerus) in the upper arm, and two bones (called the ulna and radius) in the lower arm.

Detailed explanation-2: -The circular structural unit found within compact bone is termed the osteon, and consists of a central canal surrounded by layers of bone.

Detailed explanation-3: -Short bones include the carpal bones of the hands that allow movement of the wrist, and the tarsal bones of the feet that allow movement of the ankle. Short bones are shaped roughly as a cube and contain mostly spongy bone. The outside surface is comprised of a thin layer of compact bone.

Detailed explanation-4: -Your appendicular skeleton includes the bones in your shoulders, pelvis and limbs, including your arms, hands, legs and feet.