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The four primary functions of the skeletal system are to support muscles and tissue, protect the vital organs, allow movement of bones and muscles and serve as the storage center for immature blood cells and minerals. The skeletal system has 206 bones that are vital to the human body. Full Answer >.
The key functions of the human skeletal system are: 1  Support: Our bones provide the rigidity we need to function.  Protection: The rigidity of our bones allows them to protect our internal organs from damage for example the rib cage and the skull.