Answer:
<em>At the respiratory membrane, where the alveolar and capillary walls meet, gases move across the membranes, with oxygen entering the bloodstream and carbon dioxide exiting. It is through this mechanism that blood is oxygenated and carbon dioxide, the waste product of cellular respiration, is removed from the body.</em>
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Answer:
Hippocampus
Explanation:
The part of the brain that responds strongly to aerobic exercise is the hippocampus. It supports memory, learning, navigation and perception of space.
<h2>BRAINLIESST please if this helped!</h2>
I haven't taken biology since my freshman year of high school, so this is kind of a guess. But I know for sure it isn't a solid. So I would go with a gas.