The human body is made up of a variety of parts. The skeletal system is an important part of the human body. It protects and supports the organs and tissues. It also stores minerals and produces blood cells. Muscular system is also an important part of the human body. It protects the organs and helps move the body. The respiratory system provides oxygen to all the cells in the body. The digestive system digests food and absorbs nutrients. The nervous system regulates the body's reaction to stimuli. Endocrine system controls the body's hormonal production.