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The blood picks up co2 and also waste from the tissue. So I am guessing that it is co2.
Hope this helps.
The answer for this question is physical fitness
Answer:
A habit is a behavior that is repeated so often that it becomes almost automatic. One healthy habit I have is being sure to get lots of sleep on the weekend to make up for lost sleep during the week. One unhealthy habit I have is forgetting to eat vegetables.
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Answer:
That would be Bulimia Nervosa :)
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Answer:
Trueeeeee!!!!!! pls mark me brainliest
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