The Skeletal System
By
Jocelyn Parry
Our Skeletal System is need to support our bodies. It is what gives us structure. Without our bones we would be wobbly piles of skin.
The Skeletal System protects the other organs we need to live. For example, the ribs protect the heart and lungs so that we can breathe and our bodies can receive blood from the heart. Without the skeleton our internal organs could be injured.
The Skeletal System is made up of bones that are living. Each bone has a blood supply and nerves and has the ability to grow. Bones are full of living cells and are considered an organ.
Ligaments are the stretchy bands that hold bones together. They are just like rubber bands! Rubber bands hold things together and so do ligaments! Ligaments can stretch and allow bones to move and also keep them attached.
Joints are the places where two bones meet. They allow us to move. Some examples of joints in our bodies are the knee, the elbow and the ankle.
Conclusion
The Skeletal System is a group of organs in the body that provides structure and safety. The bones in the Skeletal System are living things and have ligaments that connect them and joints that allow them to move.
This text was adapted from
The Skeletal System
by Milton Huling Ph.D.
Copyright: 2016
By: CK-12 Curriculum, Palo Alto, CA
http://www.ck12.org/book/CK-12-Fourth-Grade-Science/section/3.7/