During external respiration, are gases exchanged between the outside air and the alveoli, the alveoli and the blood, the blood and cells, the outside air and blood in the dermis, or the cytosol and mitochondria?

Answer 1

Gases are exchanged between the #color(red)"alveoli"# and the #color(red)"blood"# during external respiration.

The exchange of gases between an animal's distributing system and the outside world, specifically between the lungs' "alveoli" and the blood, is known as external respiration.

Internal respiration is the exchange of gases (as oxygen and carbon dioxide) between the #color(red)"cells"# of the body and the #color(red)"blood"#.
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Answer 2

During external respiration, gases are exchanged between the alveoli and the blood.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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