Why does the fur of animals stop growing/shed past a certain length but we have to manually cut our own hairs?

Question

Why does the fur of animals stop growing/shed past a certain length but we have to manually cut our own hairs?

In: Biology

Answer 1

Have you ever trimmed your arm hair?

Human hair stops growing at a certain length too, but that can vary. Some people’s hair starts splitting and shedding when it gets to their shoulders, others can grow it right down their back just fine. Same goes for leg hair, or beards, or pubes.

We don’t have to manually cut our hair, we just have a preferred length.