System | Organs in the System | Some Major Functions of the System |
---|---|---|
| Pumps blood and circulates it throughout the body | |
| Adds oxygen to the blood (and removes carbon dioxide from the blood) | |
| Directs intentional (and many automatic) actions of the body Enables thinking, self-awareness, and emotions | |
| Provides barrier protection between the inside of the body and the external environment | |
| Provides structure and allows motion of the body | |
| Transports oxygen and nutrients to all the cells of the body (and removes carbon dioxide and waste products) | |
| Extracts nutrients from foods Excretes waste products from the body | |
| Produces chemical messengers carried in the blood (hormones), which direct the activities of different organ systems | |
| Filters waste products from the blood | |
| Enables reproduction | |
| Enables reproduction |