By Omar Cortes - gonzalez
The elbow held's together by ligaments and on top is the Muscular system then the skin.The rib cage protects the heart, and the lungs.The spine makes you stand up right and if you did't have a spine you will not be able to move around.
The skeletal also protects many of your internal organs.
A adult has 206 bones but when you were a baby you had a lot of bones but when you are growing up were bones go together.
hip and shoulder
Hip and shoulder are flat bones but the hip is not flat at all .