an indoskeleton is a skeleton that is inside your body. humans have indoskeletons.
Internal skeletons in animals are called endoskeletons. These structures provide support, protection, and serve as attachment points for muscles. Endoskeletons are found in various animal groups, including mammals, birds, reptiles, amphibians, and fish.
An exoskeleton is where the bones are on the outside of an organism. An example could be a crab, or insect. An endoskeleton is what you and I have, bones inside the body. Exo means outside and endo means inside or within by the way.