circulation of the blood occurs in mammals b/c of the heart. it pumps the blood through out the body, which is circulation. the heart is an organ of the circulatory system
Fish have single-loop circulation.
Fallopian tubes
Oligocene
in mammals, what structure ensures the exchange substances between the embryonic and material blood circulation
Because it was rung 3 times before every battle.
juyp'[
Yes. This is a feature of all mammals, and if this did not occur, the animal would not be classified as a mammal.
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lymphatic system, blood circulation system
The main part of the circulation of a tornado when the strongest winds occur is called the core.
the veins are slighly different from another but the main difference is the warm blooded mammal compared to the cold blooded amphibian
No, just as for other mammals, there must be a male and a female for pregnancy to possibly occur.