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Resembles a bunch of grapes, with adult lungs containing over 500 million alveoli.

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Near the center of the chest, a right bronchus and left bronchus

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The bronchi divided into smaller and smaller bronchi until they divide into the smallest branches

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The cells then use the oxygen and nutrients to produce energy, water, and carbon dioxide

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Tiny, hairlike structures ,called cilia, filter uinhaled air to trp dust and other particles

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A special leaflike piece of cartilage, closes the opening into the larynx during swallowing

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When the diaphragm and intercostal muscles relax. (exhalation)

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The exchange of oxygen and CO2 between the lungs and bloodstream

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The process of breathing in air ( inhalation)

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The exchange of CO2 and oxygen between tissue cells and the bloodstream

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Lies between the pharynx and trachea & has nine layers of cartilage ( voice box)

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The division of the bronchi and alveoli are organs found in the lung

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Divides the nose into two hollow spaces, lined with a mucous membrane

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A wall of cartilage

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Has two openings called nostrils or nares through which air enters

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Lies directly behind the nasal cavities (throat)

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Each lung is enclosed in a membrane, or sac

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The process of inspiration and expiration

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Consists of the lungs and air passages

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Cavities in the skull that surround the nasal area

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A tube extending from the larynx to the center of the chest

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The process of breathing involves two phases