Every time you take a breath, you are (1) _____ the respiratory surfaces of your

Question

Every time you take a breath, you are (1) _____ the respiratory surfaces of your lungs. Each lung has approximately 300 million tiny thin-walled out-pouching air sacs called (2) ____. Inhaled air dead-ends in these (2), each of which is surrounded by a network of pulmonary (3) _______ into which oxygen from air diffuses and is exchanged for (4) ___ ___ waste gases diffusing from the bloodstream into alveolar cavities. The (5) ____ _____ surrounds each lung. In succession, air passes through the nasal cavities, pharynx, and (6) _____, past the epiglottis into the (7) ______ (the space between the true vocal cords), into the trachea, and then to the (8) _____, (9) _____, and alveolar ducts. Exchange of gases occurs across the epithelium of the (10)______. In addition to gas exchange, breathing has other functions, such as ridding the body of excess heat and water vapor, adjusting the body

Explanation / Answer

1ventilating 2bronchioles 3alveoli 4carbon dioxide 5pleural membrane 6larynx 7glottis 8bronchi 9 10capillaries 11vocalizations

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