The skeletal system performs numerous vital functions, including body support, movement, protection, calcium storage, blood cell production and endocrine regulation. These functions are essential to every other function of the human body, contradicting the common myth that the skeleton is only structural.
The most important function of the skeleton is the production of blood cells. Some of the bones in the human body are filled with bone marrow, a substance that produces red and white blood cells. The blood cells produced by the bone marrow are crucial because red blood cells provide oxygen to the body, and white blood cells are essential for fighting infection and maintaining the immune system.
The skeleton holds all vital organs in place when the body is in movement, while the vertebral column holds the body itself in an upright position.The skeleton provides protection for the vital organs in the human body, including the brain and vital organs in the chest. The cranium is dense enough to absorb shock and withstand injury while protecting the brain, and the ribs provide protection for the lungs and heart. The skeleton also lends shape and structure to the body overall, and it is the determining factor in adult height and build.