B. all eukaryotic cells
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Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of capillaries. Capillaries are the smallest blood vessels , they are only one cell thick, and they act as sites of the transfer of oxygen and other nutrients from the bloodstream to the body tissues. Additionally, they also collect carbon dioxide, waste materials and fluids for return to the veins.
Answer:
The subunits of hemoglobin differ in size, shape, or charge.
Explanation:
The amount of stuff inside the cell and outside the cell are equal
