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The Skeletal System Teacher Pages. The adult human skeletal system has 206 bones that provide support, protection and shape to the body. It also has other important but lesser known functions that allow the body to store minerals, make blood cells, and grow. Bone Structure. The structure of bones allows for strength.
Immune System: The Immune system is the bodyâs main defense against all foreign substances. Integumentary System: The integumentary system is the organ system that protects the body from damage, comprising the skin and its appendages (including hair, scales, and nails). Respiratory System: A respiratory systemâs function is to allow gas exchange.