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Vein

a. Any of the fine branching of blood vessels that network between arterioles and venules
b. A tube that has an internal diameter of hair-like thinness
C. Any of the tubes that carry blood toward the heart
d. Any of the tubes that carry blood away from the heart.

1 Answer

5 votes

Answer:

a. Any of the fine branching of blood vessels that network between arterioles and venules

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