If I look at the back of my hand and look closely, there are little lines that create triangular shapes on my skin. It’s not the veins. Why are they like that?
In: Biology
It’s just extra skin that allows for a wide range of movement. I’m assuming it’s in those patterns because it’s most efficient that way. Its like a grid basically. The skin on your hands needs to be extra flexible and durable. The pattern kind of reminds me of elephant skin and elephant skin is known for being tough. So I imagine that grid pattern allows for duribility without too much loss of sensitivity or flexibility.
Skin has to be elastic in order to stretch as you move. You’re more likely to see those lines on joints or areas that move a lot (like your hand and face). It’s just the excess skin stretching to accommodate movement.
Those are creases that let you bend in those ways. The same way if you made origami then unfolded it
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