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Crossword clues

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Abnormally high acidity of the blood and other body tissues
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A common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas
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The bright red hemoglobin that is a combination of hemoglobin and oxygen from the lungs
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The organ of smell and entrance to the respiratory tract
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A chemical agent capable of reducing the ___ tension of a liquid in which it is dissolved
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Tough elastic tissue
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Either of two saclike respiratory organs in the chest of vertebrates (plural)
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Protective secretion of the mucous membranes
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The metabolic processes whereby certain organisms obtain energy from organic molecules
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Gas in the air that we need to breathe
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A cartilaginous structure at the top of the trachea
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One of the tubules forming the respiratory system of most insects and many arachnids
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A medication to be taken by ___ it
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United States writer
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A mechanical device in a camera that controls size of aperture of the lens
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Either of the two main branches of the trachea
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