A group of organs that work together as a whole to accomplish some function together.
Organ System
This system works as the transportation highway for the body. It consists of the heart, blood, and blood vessels. It transports substances such as oxygen, carbon dioxide, and nutrients in the body.
Circulatory System
Exchange gases between the blood deep in the body and the air. Oxygen gas moves into the blood and CO2 moves out of the blood.
Respiratory System
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