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The greatest concentration of CO2 in an adult is found in the:

A pulmonary artery.
B renal artery.
C iliac artery.
D aorta.

User Ali Sao
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Answer:

A

Step-by-step explanation:

The pulmonary artery carries de-oxygenated blood from the right ventricle of the heart to the lungs. It is the only artery that carries de-oxygenated blood. This blood is usually from the tissues and has a lot of carbon dioxide from the cellular respiration of cells around the body. The blood is pumped to the lungs to be oxygenated and the carbon dioxide expelled.

User Simon Sabin
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