Answer:
Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.
Explanation:
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Through the ambilical cord
The Answer would most likely be A. The reason for that is because if there is a decrease in hunting the population would grow as long with the surplus of food. If there is no animals hunting them for food then the population would grow. So the first one is only the one that would kill them off.
If oxygen is present, then glucose can be broken all the way down into carbon dioxide and water. This process is called aerobic respiration because it requires air (oxygen). In the absence of oxygen, the cell uses a process called anaerobic fermentation. or simply fermentation.