Besides bones, what else makes up the skeletal system?
Ligaments, tendons and cartilage.
The skeletal system
An adult human skeleton consists of around 206 bones, which are fused from 270 at birth, as well as tendons, ligaments and cartilage that connects them.
The skeletal system performs vital functions — support, movement, protection, blood cell production, calcium storage and endocrine regulation — that enable us to survive.