Key Structures of the Mammalian Gaseous Exchange System

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  • Created by: chxrwest
  • Created on: 14-01-16 09:44
Nasal Cavity
a large surface area with a good bloody supply, which warms the air to body temperature, moist and hairy surfaces to secrete mucus trap dust etc and increase humidity reducing evaporation.
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Trachea
main airway, a wide tube supported by incommplete cartilage. Lined with ciliated epithelium and goblet cells. Cilia beat and move the mucus away from the lungs which is secreted by the goblet tissues.
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Bronchus
The trachea divides to form the left and righ bronchi.
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Bronchioles
Bronchi divide to form smaller bronchioles which contain smooth muscles which regulate the amount of air reaching the lungs. It is possible for a small amount of gaseous exchange to occur on the flattened epithelium.
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Alveoli
Tiny air sacs. Consists of flattened wpithilial cells, collageb abd ekastic fibres to allow them to stretch as air is drawn in
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Main Adaptions of Alveoli?
Large surface area, thin layers, good blood supply and ventilation.
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Other cards in this set

Card 2

Front

main airway, a wide tube supported by incommplete cartilage. Lined with ciliated epithelium and goblet cells. Cilia beat and move the mucus away from the lungs which is secreted by the goblet tissues.

Back

Trachea

Card 3

Front

The trachea divides to form the left and righ bronchi.

Back

Preview of the back of card 3

Card 4

Front

Bronchi divide to form smaller bronchioles which contain smooth muscles which regulate the amount of air reaching the lungs. It is possible for a small amount of gaseous exchange to occur on the flattened epithelium.

Back

Preview of the back of card 4

Card 5

Front

Tiny air sacs. Consists of flattened wpithilial cells, collageb abd ekastic fibres to allow them to stretch as air is drawn in

Back

Preview of the back of card 5
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