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| The uptake of molecular oxygen from the environment and the discharge of carbon dioxide to the environment. |
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| In insects, a system of branched, air-filled tubes that extends throughout the body and carries oxygen DIRECTLY to cells. |
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| An infolded respiratory surface of a terrestrial vertebrate, land snail, or spider that connects to the atmosphere by narrow tubes. |
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| Pairs of bands of elastic tissue in the larynx. Air rushing past the tensed vocal chords makes them vibrate, producing sounds. |
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| The portion of the respiratory tract containing the vocal chords, also called the voice box. |
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| The portion of the respiratory tract that passes from the larynx to the bronchi; also called the windpipe. |
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| A fine branch of the bronchi that transports air to to alveoli. |
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Definition
| Breathing tubes that branch from the trachea into the lungs. |
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| One of the dead-end, multilobed air sacs where gas exchange occurs in a mammalian lung. |
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| A sheet of muscle that forms the bottom wall of the thoracic cavity in mammals. Contraction of the diaphragm pulls air into the lungs. |
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Definition
| An iron-containing protein in red blood cells that reversibly binds oxygen. |
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Definition
| The exchange of a substance or heat between two fluids flowing in opposite directions. Ex: blood in a fish gill flows in opposite direction of water passing over the gill, maximizing diffusion of oxygen into and carbon dioxide out of the blood. |
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Definition
| The maximum volume of air that a mammal can inhale and exhale with each breath. |
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Definition
| The amount of air that remains in the lungs after forceful exhalation. |
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Term
| Breathing control centers |
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Definition
| A brain center that directs the activity of organs involved in breathing. |
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Term
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Definition
| The volume of air that a mammal inhales and exhales with each breath. |
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