![]() ![]() protection of vital structures, such as the spinal cord, brain, heart, and lungs. ![]() The skeletal system is the body system composed of bones and cartilage and performs the following critical functions for the human body: In the areas of the skeleton where bones move (for example, the ribcage and joints), cartilage, a semi-rigid form of connective tissue, provides flexibility and smooth surfaces for movement.
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