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19 Cards in this Set
- Front
- Back
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Function of Respiratory System |
Ensures that oxygen enters the body and carbon dioxide leaves the body |
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Inspiration |
Breathing in / inhalation Air is conducted from the atmosphere to the lungs by a series of cavities, tubes and openings |
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Expiration |
Breathing out / exhalation Air is conducted from the lungs to the atmosphere by series of cavities, tubes and openings |
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Ventilation |
Another term for breathing Includes both inhalation and expiration |
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Cellular Respiration |
Cells use up O2 and produce CO2 The respiratory system provides cells with O2 and removes CO2 |
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Why is gas exchange necessary? |
It is necessary because the cells of the body carry out cellular respiration to make energy in the form of ATP |
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No Crazy Person Ever Gets Little Things But Buys Large Diamonds |
N asal C cavity P harynx E piglottis
L arynx T rachea B ronchus G lottis L arynx T rachea B ronchus B ronchioles L ung D iaphragm B ronchioles L ung D iaphragm
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Nasal Cavity |
Filters, warms and moistens air |
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Pharynx |
Passageway for air and food |
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Epiglottis |
Above glottis Keeps food out of airway |
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Glottis |
Not a structure Space between the vocal cords Opening to larynx |
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Larynx |
Voice box Produces sound |
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Trachea |
Windpipe Passage of air to bronchi |
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Bronchus |
Passage of air to lungs |
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Bronchioles |
Regulate how much air comes in Passage of air to alveoli Smooth muscle along outside |
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Lung |
Contains alveoli (air sacs) Carries out gas exchange |
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Diaphragm |
Skeletal muscle Functions in ventilation |
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Process of Inspiration |
Respiratory nuclei in Medulla Oblongata Send nerve impulses to the spinal cord which go to left and right phrenic nerves at cervical regions C3, C4 and C5. Impulses go down spinal column to diaphragm Diaphragm lowers(goes down)leaving more space in thoracic cavity Thoracic volumes increases and Intrathoracic pressure decreases to a point where it's lower than atmospheric pressure Then air enters |
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Exhalation/Expiration |
Happens by ELASTIC RECOIL OF LUNG TISSUE |
