External respiration refers to gas exchange between which structures?

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Study for the AAMI Certified Associate in Biomedical Technology Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

External respiration refers to gas exchange between which structures?

Explanation:
External respiration is the exchange of gases between the air in the lungs and the blood in the pulmonary capillaries. Oxygen moves from the alveolar air into the blood, and carbon dioxide moves from the blood into the alveolar air to be exhaled. This alveolar–pulmonary capillary interface distinguishes it from internal respiration, which is the gas exchange between blood and body tissues, and from cellular respiration, which is the cellular use of oxygen to produce energy.

External respiration is the exchange of gases between the air in the lungs and the blood in the pulmonary capillaries. Oxygen moves from the alveolar air into the blood, and carbon dioxide moves from the blood into the alveolar air to be exhaled. This alveolar–pulmonary capillary interface distinguishes it from internal respiration, which is the gas exchange between blood and body tissues, and from cellular respiration, which is the cellular use of oxygen to produce energy.

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