Why do children grow milk teeth, and what’s their purpose? Why can’t they grow regular teeth directly?

Question

Why do children grow milk teeth, and what’s their purpose? Why can’t they grow regular teeth directly?

In: Biology

Answer 1

That’s a trick mammals developed. The benefit is that our teeth fit perfectly into our jaw, wich allows biting things of cleanly and chewing efficiently (think about the effort a crocodile takes to bite something off, or how birds have to swallow things whole)

This means we can’t be born with teeth, and we can’t immediately grow adult teeth, because those wouldn’t fit into our (growing) mouth perfectly. This also means after birth we rely on being fed by our mother.