Both invertebrates and vertebrates, with the exception of the
1 answer:
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I’m assuming it must need food in order to survive?
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One sister chromatid is inherited from each parent.
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C is the answer
Explanation:
my teacher told us it in like 4th grade
- Each alveolus is cup-shaped with very thin walls.
- It’s surrounded by networks of blood vessels called capillaries that also have thin walls.
- The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.
- The carbon dioxide you breathe out is diffused from the capillaries to the alveoli, up the bronchial tree and out your mouth.
- The alveoli are just one cell in thickness, which allows the gas exchange of respiration to take place rapidly.
Thermal energy could be an answer
