How do crash helmets reduce injuries?

Answer:
Crash helmets reduce injuries by absorbing most of the impact shock. An easy to understand example is how an egg carton made of foam keeps the fragile egg from cracking by taking all of the knocks and bangs that would've cracked the egg. Your head is like the egg, and the crash helmet absorbs the shock of getting hit like the carton.
First answer by Lilmomo1. Last edit by Lilmomo1. Contributor trust: 10 [recommend contributor recommended]. Question popularity: 2 [recommend question].