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15 Cards in this Set
- Front
- Back
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Why gas exchange efficient? |
Large surface area Moist lining One cell thick (squamous epithelium) Network of blood capillaries |
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Nose |
Warms filters moistens air Contains smell receptors Resonating chamber to enhance speech spunds |
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Larynx |
Vocal cords vibrate to produce sound when air oasses through |
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Epiglottis |
Flap of tissue closes over trachea so food & liquid cannot enter the lungs |
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Trachea |
Contain cartilage (c shaped) allows trachea to be flexible Lined with mucous membrane (cilia) Cilia beats to move dust & excess mucous to oesophagus |
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Bronchi |
2 primary bronchi Subdivide to secondary ( top 2) and tertiary (bottom 2) bronchi
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Bronchioles |
Fine tubes with walls of smooth muscles |
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Alveoli (plural) Alveolus (singular) |
Walls thin Air sacs (bunch) Network of blood capillaries for o2 co2 gas exchange alveolar duct |
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Lungs |
In chest cavity 2 layered membrane called pleural membrane Between pleura is pleural fluid |
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Diaphragm |
(Inspiration) Contracts & flattens (Expiration) Relaxes & dome shape |
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Ribs |
Framework of chest (Inspiration) Extend ribs upward outwards (Expiration) Move down and inwards |
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Intercostal muscle |
(Inspiration) contracts (Expiration) relaxes |
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Lung volume |
(Inspiration) increase volume of lung (Expiration) reduce volume if chest cavity & chest |
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Pressure in lungs & external environment |
(Inspiration) air pressure in lungs is less than outside (Expiration) air pressure in lungs is greater than outside |
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Co2 |
CO2 comes from cellular respiration 4.3% of bloodstream in CO2 |
