The Circulatory System
The circulatory system is the body system responsible for:
- supplying cells with oxygen and needed nutrients
- removing waste from the body
- protecting the body against harmful microorganisms
Components of the Circulatory System
The circulatory system consists of:
- The heart, the organ that pumps blood through the blood vessels;
- The blood vessels, which distribute blood to the different parts of the body; and
- The blood, which carries oxygen to the lungs and the heart
