Answer:
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Explanation:
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Answer:
The pulmonary veins carry oxygenated blood to the heart. Air enters the bronchioles in the lungs and reaches the alveoli. The capillaries join together to reach the arteries, transferring the oxygen. The oxygen-rich blood moves from the aorta and reaches the kidneys through a series of blood vessels.
In 1665, Robert Hooke observed D. Cell Walls through a microscope!
The answer is "At least 15".
Explanation:
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