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what gas exchange happens in the respiratory system and what is the large blood vessel that carries blood from the heart to the lungs.

Sagot :

Answer:

Explanation:

The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide. The blood then returns to the heart through the pulmonary veins.