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Alveolus. A). 15 Jun 2016 It also forces the red blood cells close to the walls of the capillaries, decreasing the diffusion distance. The mechanism of gas exchange. Oxygen Fig 1 Schematic cross section ofa capillary lying within the alveolar wall.

Alveoli and capillaries diagram

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Categories: Education , Healthcare/Medical. When the inhaled air reaches the alveoli, the oxygen passes into the blood due to a low partial pressure of oxygen in them. On the other hand, carbon dioxide passes into a low CO 2 pressure region in the alveoli from a high CO 2 pressure region in the capillaries [22, 23]. Labeled Diagram of Alveoli Gas Exchange.

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There are approximately 700 million alveoli in the lungs, covering a total surface area of about 70 m 2, which is a considerably larger surface area relative to volume. The large surface area makes gas exchange with the bloodstream more efficient. As it moves through blood vessels (capillaries) in the alveoli walls, your blood takes the oxygen from the alveoli and gives off carbon dioxide to the alveoli. Alveoli are tiny balloon shaped structures and are the smallest passageway in the respiratory system. The alveoli are very thin, allowing the relatively easy passage of oxygen and carbon dioxide (CO2) between the alveoli and blood vessels called capillaries.
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TASK: add to the spider diagram any words you would associate with the cardiovascular system The alveoli are covered in tiny capillaries (blood vessels ). 2 Nov 2018 Air reaches the alveolar lumen via a conducting airway tree.
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Some water vapour is also lost from the surface of the alveoli into the • Label the diagram on the next page. Page 8. Alveoli and Pulmonary Capillaries • The pulmonary arteries carry blood which is low in oxygen from the heart to the lungs.

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Capillary. Alveolus. A). 15 Jun 2016 It also forces the red blood cells close to the walls of the capillaries, decreasing the diffusion distance.