Question

In humans, how is the circulatory system tied to the respiratory system? ( you may enter up to 150 characters. )

Answer 1

The systems work together by circulating blood and oxygen all around the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.

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