Muscles and Bones

We have a visitor to our classroom this week! He has lived at McGuffey for quite some time, and has been affectionately named “Brainless Bob.” He is a life-size plastic skeleton, which allows our class to see exactly what is going on underneath their skin. (We somehow forgot to take photo of him while he was visiting!)

As we have been talking about our skeleton, we learned that we have 206 bones in our bodies. Some are big and some are small. Our largest bone is our upper leg and the smallest is in our ear. We discovered that we could feel many bones in our bodies—our knuckles, hips, ribs, and shoulder blades. Bones give us shape and protect important organs like the brain.

One of the works in the classroom this week is a full set of human x-rays. Children can take time to browse each x-ray, comparing them to their own bodies. They can even build a complete skeleton out of x-rays!

We also talked about our muscles. We used a partially inflated ballon, stretching and releasing it to explain how muscles expand and contract. We learned that muscles are in our face and help us smile and make silly faces. We also learned that muscles are part of our digestive system starting with the tongue.

In the past six weeks we have discussed nutrition, digestion, respiration, circulation, muscles, and bones. Although it’s pretty complicated, we have a much better sense of how our bodies work!


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