| Organ System |
Functions |
Major Organs |
| Muscular |
Allows movement and mobility as the muscles contract or relax; help provide heat to maintain normal body temperature; pushes food along the digestive tract; draws air into the lungs pumps and circulates blood |
skeletal muscles, smooth muscles, cardiac muscles |
| Nervous |
Controls most of the internal body processes; directs behavior and movement, relays nervous signals |
brain, spinal cord, nerves |
| Respiratory |
Allows gas exchange between the blood and the environment, by supplying oxygen to the blood and taking away carbon dioxide from the blood |
nose, trachea, bronchi, lungs |
| Reproductive |
Allows reproduction to happen—in the male: produces, maintains, and transports sperm cells |
male: testes, scrotum, penis, vas deferens; female: ovaries, uterus, vagina |
| Skeletal |
Gives the body support and shape; protects the internal organs; provides attachment points for muscles to allow movement; serves as site of production of new blood cells |
bones, tendons, ligaments, cartilages |
