The Mechanics of Breathing
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Breathing | The mechanism by which mammals ventilate their lungs. Air flows from a region of HIGH pressure to a region of LOW pressure.
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| Intercostal Muscles | Muscles between the ribs on the rib cage.
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| Diaphragm | A muscle that separates the lungs from the stomach. (Every mammal has a _________).
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| Inhalation | When the external intercostal muscles and diaphragm contract. Diaphragm moves down in the chest cavity which increases the volume of this cavity.
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| Exhalation | The external intercostal muscles and diaphragm relax. Internal intercostal muscles contract to pull the rib cage back to its original position.
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| Tidal Volume | The volume of air inhaled and exhaled in a normal breathing movement.
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| Inspiratory Reserve Volume | Additional volume of air that can be taken in, beyond the tidal volume.
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| Expiratory Reserve Volume | The additional volume that can be forced out of the lungs, beyond the tidal volume.
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| Vital Capacity | The total volume of gas that can be moved in or out of the lungs.
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| Residual Volume | The amount of gas that remains in the lungs and the passageways of the respiratory system even after a full exhalation.
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| Respiratory Efficiency | The rate at which the oxygen can be transferred into the blood stream for transport to the rest of the body.
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Created by:
Inkina
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