The skeletal elements, joints, and skeletal musculature together form
the organs of locomotion. In addition, the skeletal elements function to
protect other organ systems (bones of the skull, vertebral canal, chest
cage).
The Bones
The bony skeleton consists of bones of various structures and shapes. In
the adult human, the skeleton is composed of about 200 individual
bones, which are connected by cartilaginous, fibrous, and synovial joints.
Each bone, with the exception of the cartilaginous joint surfaces and
areas where flat tendons are attached, is enclosed in a connective tissue
sheath, the periosteum, like a stocking.
The shape of each bone is determined genetically, but its structure
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