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English: The respiratory system consists of the airways, the lungs, and the respiratory muscles that mediate the movement of air into and out of the body. Other languages: Afrikaans : Die asemhalingstelsel bestaan uit lugweë, die longe en die respiratoriese spiere wat lugbeweging in en uit die liggaam reguleer
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The following other wikis use this file: Usage on fa.wikipedia.org دم (تنفس) Usage on fr.wikipedia.org Inhalation; Usage on hi.wikipedia.org
An alveolus (plural: alveoli, from Latin alveus, "little cavity"), is an anatomical structure that has the form of a hollow cavity. Mainly found in the lung, the pulmonary alveoli are spherical outcroppings of the respiratory bronchioles and are the primary sites of gas exchange with the blood. Date: December 2007: Source: Own work using:
There are four main pulmonary veins, two from each lung – an inferior and a superior main vein, emerging from each hilum. The main pulmonary veins receive blood from three or four feeding veins in each lung, and drain into the left atrium. The peripheral feeding veins do not follow the bronchial tree.