Skeletons can be defined by several attributes. Solid skeletons consist of hard substances, such as bone, cartilage, or cuticle. These can be further divided by location; internal skeletons are endoskeletons, and external skeletons are exoskeletons.
Human skeleton anatomy describes the bones inside our body that give us shape and support. The skeleton helps us stand, sit, walk, and move. It also protects important organs like the brain, heart, and lungs. At birth, a human baby has about 270 bones. As we grow, some bones join together.