Blood brings carbon dioxide from the rest of the body for release into the:
alveoli
The correct answer is option 2 i.e. alveoli.
Blood brings carbon dioxide from the rest of the body to be released into the alveoli. The process begins when deoxygenated blood returns to the right side of the heart. From here, it is pumped to the lungs where the blood flows through the capillaries surrounding the alveoli. The carbon dioxide in the blood diffuses into the alveoli, while oxygen diffuses from the alveoli into the blood. This exchange occurs through the process of gas exchange, allowing carbon dioxide to be exhaled from the body, and oxygen to be absorbed.
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