Explain how the repiratory and the circulatory system work together. To make gas exchange possible.

here's the more, get to the point  so the circulatory system is responsible for gas exchange between tissues and blood that we need. All living creatures (including us) have blood and that blood absorbs oxygen and releases carbon dioxide to/in the lungs (respiratory system).  Thus the circulatory and respiratory system helps us to obtain oxygen and discharge carbon dioxide

Explanation:

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The two systems work together in several ways. First, the respiratory system brings oxygen in the air to the alveoli in the lungs. The circulatory system then delivers the oxygen to the cells. Second, the circulatory system picks up carbon dioxide from the cells and carries it to the lungs, where it is released when we exhale.

Explanation:

This is what I did thank you have a nice day

not sure if this what   you'r looking for would be percent composition