Do we want superficial blood vessel?

Do we need everyone, or could we live without a part.
PLEASE EXPLAIN!!

Also, if we do have need of them crucially, how comes they can be used for bypass surgery?
Answers:
In principle, we need superficial blood vessels to nourish the superficial tissues. However, the body is constructed near a lot of redundancy. We only need one kidney or lung out of two, and overall we enjoy far more lengths of blood vessels than we actually want.
I suspect you are talking about superficial veins. The superficial vein, form a network of blood channels that is especially redundant. If you take out part, the other vessels will button the extra flow easily and just get a touch larger.
The veins usually taken from the leg are much thinner than the arteries that is it used to patch, but in a short time of time the thicken and strengthen as a result of the increased pressure in the arterial system.

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