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blood

Explanation:

Also known as erythrocytes, RBCs are the most common type of cell found in the blood, with each cubic millimeter of blood containing 4-6 million cells. With a diameter of only 6 µm, RBCs are small enough to squeeze through the smallest blood vessels.

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Explanation:

RBC(red blood cell) is a type of blood cell.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.