The structure in the lungs known as the respiratory membrane is where gases are exchanged- oxygen leaves the lungs and enters the blood, and carbon dioxide leaves the blood and enters the lungs. The respiratory membrane is composed of two extremely thin layers of simple squamous epithelium. Explain how the structure of the respiratory membrane follows its function.

Question
Asked Sep 9, 2019

The structure in the lungs known as the respiratory membrane is where gases are exchanged- oxygen leaves the lungs and enters the blood, and carbon dioxide leaves the blood and enters the lungs. The respiratory membrane is composed of two extremely thin layers of simple squamous epithelium. Explain how the structure of the respiratory membrane follows its function.

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Step 1
The wall that separates air within the alveoli from the blood within the pulmonary
capillaries is known as the respiratory membrane. It consists of the alveolar wall
the capillary wall, and their basement membranes. The respiratory membrane has
gas flowing past on one side and blood flowing past on the other, and is, therefore,
known as the blood-air barrier.
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The wall that separates air within the alveoli from the blood within the pulmonary capillaries is known as the respiratory membrane. It consists of the alveolar wall the capillary wall, and their basement membranes. The respiratory membrane has gas flowing past on one side and blood flowing past on the other, and is, therefore, known as the blood-air barrier.

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Step 2
The gaseous exchange takes place by simple diffusion through the respiratory
membrane. Oxygen passes from the alveolar air into the capillary blood and
carbon dioxide leaves the blood to enter the gas-filled alveoli by diffusion,
following the law of partial pressure. Exchange of gases supplies oxygen to the
cells and removes carbon dioxide, a waste product that is exhaled by the lungs
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The gaseous exchange takes place by simple diffusion through the respiratory membrane. Oxygen passes from the alveolar air into the capillary blood and carbon dioxide leaves the blood to enter the gas-filled alveoli by diffusion, following the law of partial pressure. Exchange of gases supplies oxygen to the cells and removes carbon dioxide, a waste product that is exhaled by the lungs

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Step 3
The respiratory membrane forms the walls of the pulmonary alveoli. It is
extremely thin in nature as it contains only two cells, alveolar epithelial cells and
pulmonary capillary cell. The distance for gas exchange is thus only about half a
micrometer. Moreover, gas exchange occurs by diffusion across the respiratory
membrane. This short distance allows oxygen and carbon dioxide to diffuse easily
and very quickly. The respiratory membrane is folded into about 300 million
small air sacs called alveoli that branches off from the respiratory bronchioles in
the lungs. Thus, it provides an extremely large surface area for gas exchange to
occur
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The respiratory membrane forms the walls of the pulmonary alveoli. It is extremely thin in nature as it contains only two cells, alveolar epithelial cells and pulmonary capillary cell. The distance for gas exchange is thus only about half a micrometer. Moreover, gas exchange occurs by diffusion across the respiratory membrane. This short distance allows oxygen and carbon dioxide to diffuse easily and very quickly. The respiratory membrane is folded into about 300 million small air sacs called alveoli that branches off from the respiratory bronchioles in the lungs. Thus, it provides an extremely large surface area for gas exchange to occur

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