Which organ is the primary organ of respiration?

Study for the Pivot Point The Building Blocks of the Human Body 105E.01. Engage with multiple choice questions and flashcards, complete with hints and explanations. Get ready for your exam!

Multiple Choice

Which organ is the primary organ of respiration?

Explanation:
Gas exchange happens mainly in the lungs. Tiny air sacs called alveoli inside the lungs allow oxygen from the air to diffuse into the blood and carbon dioxide from the blood to diffuse out to be exhaled. The diaphragm helps breathing by contracting to enlarge the chest cavity and draw air in, but it isn’t where gas exchange occurs. The heart is part of the circulatory system that moves blood, and the liver handles metabolism, not respiration.

Gas exchange happens mainly in the lungs. Tiny air sacs called alveoli inside the lungs allow oxygen from the air to diffuse into the blood and carbon dioxide from the blood to diffuse out to be exhaled. The diaphragm helps breathing by contracting to enlarge the chest cavity and draw air in, but it isn’t where gas exchange occurs. The heart is part of the circulatory system that moves blood, and the liver handles metabolism, not respiration.

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