Is this genetic? Do they change over time or stay the same from birth? Why are they not the same compared to the opposite side of the body (ex. rt hand vein pattern vs lt hand vein pattern)? Are there health benefits or negatives to the shape of the pathway (not including the obvious ease or difficulty with blood draws/IVs)?
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Basically think of the blood vessels in the body like a rural road network, the main highways are relatively wide straight paths to the destinations, the minor vessels need to pass close enough so that all the cells in the body are close enough to get a supply of nutrients and have their waste collected.
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