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made of one layer of squamous epithelial tissue and contain a rich network of blood capillaries

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the trachea divides into two bronchi near the center, a right bronchus and a left bronchus, each bronchus enters a lung and carries air from the trachea to the lungs

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the smallest branch of the lungs

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using oxygen and nutrients to produce energy, water, and carbon dioxide

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tiny hair-like structures that filter inhaled air to trap particles and dust

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

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exhalation

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exchange of oxygen and carbon dioxide between the lungs and the bloodstream

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inhalation

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exchange of oxygen and carbon dioxide between tissue cells and bloodstream

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voice box that lies between the pharynx and the trachea

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an organ that contains the bronchi and alveoli

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lined with mucous membrane and have a rich blood supply

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divides the nose into two hollow spaces

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two openings called nostrils through which air enters

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lies directly behind the the nasal cavities

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sac that encloses the lungs

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the process of inspiration and expiration

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consists of 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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process of breathing