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Veins in land animals have muscles to help them contract and send the blood against the forces of gravity. True False
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Answer #1

Answer) True.

Yes it is true that, veins in land animals have muscle to help them contract and send the blood against the force of gravity.

In land animals veins are very less muscle and they are very close to the skin through which blood circulates in a rhythmic movement into whole body.There is a rhythmic movement in the veins through which blood moves and in most of the vein blood. Mostly in veins blood moves against the pull of gravity and prevented from flowing backward in the veins by one-way valves.

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