资讯

The human skeleton is made up of more than 200 bones that give protection and support and allow the body to move. The skeleton gives the body its shape and helps hold it up. Without it ...
Some animals, such as insects, crabs and lobsters, have a skeleton outside their body. These are called exoskeletons.
From the skull to the smallest bone in your pinky toe, the skeleton acts as internal scaffolding to give stability to the body, and forms protective cocoons around important organs. Despite their ...