The human skeleton consists of both fused and individual bones supported and supplemented by ligaments, tendons, muscles and cartilage. It serves as a scaffold which supports
organs, anchors muscles, and protects organs such as the brain, lungs and heart.
Because of these and other factors affecting an individual's weight the human
skeleton may comprise between 12 and 20 percent of a person's total body weight
with the average being 15 percent.
Fused bones include those of the pelvis and the cranium. Not all bones are interconnected
directly: there are three bones in each middle ear called the ossicles that articulate only with each other.
The types of joints are:Hinge,Ball-and-Socket,Gliding,Condyloid,Sanddle,and Pivot.
There are a total of 206 bones in the human body.