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vagabundo [1.1K]
3 years ago
9

Can someone please help me Will mark u brainliest !

Biology
2 answers:
Andreyy893 years ago
8 0

Answer:

Letter C

Explanation:

VLD [36.1K]3 years ago
7 0

Answer:

d i think

Explanation:

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What function do the alveolar sacs serve in the respiratory system?
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These alveoli are the smallest types of lung tissue, and one of the most important. In addition to being the primary means by which oxygen enters and carbon dioxide escapes the bloodstream, these small pouches of air are also the reason why the lungs do not totally collapse when a person breathes out. This is because they contain a cell that secretes a special chemical to lower the surface temperature to prevent lung collapse. The alveoli also contain other cells that secrete chemicals to attack and remove any foreign objects in the lungs, such as dust, dirt and other debris.

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SHORT ANSWER:

Alveolar sacs contain tiny pouches called alveoli, whose primary function is gas diffusion. These clusters of alveoli have thin walls that allow oxygen to pass easily from the lungs into the bloodstream and carbon dioxide to flow from the blood to the lungs so it can exit the body.

8 0
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