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Scrat [10]
3 years ago
7

Im dum.b and suck at science so can someone answer? please

Biology
1 answer:
klio [65]3 years ago
3 0
A .
give me brainiest
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Answer:

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The respiratory system is made up of a set of organs that carry air into the body and facilitate gas exchange, i.e. the entry of O₂ into the blood and the elimination of potentially harmful carbon dioxide (CO₂).

This exchange of gases occurs in structures called pulmonary alveoli, whose surface is located in relation to the pulmonary capillary vessels.

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Both O₂ and CO₂ require a transport molecule in the blood, red blood cell hemoglobin, which binds the gases and allows them to be transported to and from the tissues.

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