Human Organ Systems
The human body is made up of several organ systems that all work together as a unit to make sure the body keeps functioning. Each of the major organ systems in the body plays a different role in helping the body work.
Systems of the Human Body
The human body is made of 11 important organ systems, including the circulatory, respiratory, digestive, excretory, nervous and endocrine systems. They also include the immune, integumentary, skeletal, muscle and reproductive systems. The systems work together to maintain a functioning human body.