Question

why caterpillars shed their skin when they grow bigger but we humans dont

Answer 1

caterpillars are larval forms of insect such as butterfly. caterpillars shed their skin 3 to 5 times while the grow and this process is called molting . their skin never grows as skin if human does , so while growing they have to crawl out of their skin when their skin becomes too tight. after 1st molting they bring new skin cover and in the mean time some caterpillars also eat their shed old skin . after they grow more then again she'd their skin.

in case of humans shedding of whole skin doesn't occur as when human body grows , skin cells also grow . shedding of only dead skin cells occur in human beings.

Answer 2

The larval forms of pest such as the butterfly are known as Caterpillars. Throughout their growth caterpillars shed their skin 3 to 5 times and this process is most commonly known as molting. Their skin does not grow just like humans so during the course of their growth they have to drag out of their skin when their skin shifts too firm. After their first molting, they take over a new skin and throughout this time some of the caterpillars eat their old shed skin. Therefore, when they grow more they repeatedly shed their skin.

But in the illustration of humans molting of entire skin doesn't happen as when the human body began to grow, their skin cells also develop. Shedding of only lifeless skin cells befalls in human beings.