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In the alveoli
The respiratory system; the lungs.
The respiratory system transfers oxygen from the lungs to the circulatory system. The circulatory system transfers the carbon dioxide into your lungs and we then breathe it out.
The respiratory system takes in oxygen and releases carbon dioxide. It works closely with the circulatory system.
The respiratory system
1. Respiratory system 2. Cardiovascular system
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The respiratory system helps the circulatory system. circulatory system
They trade oxygen and carbon dioxide.
Pumps oxygen
circulatory .
circulatory .