why do we need bones and muscles
This simple demonstration answers the question of why the human body needs both muscles andP bones. P This is a great introduction for young children to the various systems in our bodies and how they work together. PThis activity was inspired by
(which we checked out from our library). Our boys were especially excited about this experiment because it involvedP eatingP two of their favorite things: Ppancakes and cookies. P:) Here s what you ll need for this demonstration: Pa pancake and a gingerbread man (or overcooked sugar cookie). P PThe pancake illustrates what our muscles are like bendable but can t hold anything up.
PThe cookie demonstrates what our bones are like: Pstrong but stiff. Our bones are strong and hold our bodies up (just like the cookie is able to stand upright without falling to the ground). But out muscles are bendable and allow us to move. PWhen you try to move bones (without muscles), they can t move much without snapping in half. Oops. What other ways have you found to explain to children why we need both muscles and bones? * PAlso, be sure to check outP! P* Why do we need a skeleton? Our skeleton is made of more than 200 bones. Calcium and other minerals make the bone strong but slightly flexible.
Bone is a living tissue with a blood supply. It is constantly being dissolved and laid down, and it can repair itself if a bone is broken. Exercise and a balanced diet are important for a healthy skeleton. to help the body move. The skeleton supports the body. For example, without a backbone we would not be able to stay upright. the backbone protects the spinal cord. Some bones in the skeleton are joined rigidly together and cannot move against each other. Bones in the skull are joined like this. Other bones are joined to each other by flexible joints. Muscles are needed to move bones attached by joints.
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