MCA24
Do you know that your mouth is like a little mill? Your teeth grind your food. The front teeth are shaped to bite the food into bits. The others are made to grind it fine so that it can be made into liquid by the stomach. Probably you have twenty-four teeth now, but when you grow up you should have about thirty-two. Enamel is the hard outer covering of the teeth. To crack nuts with you teeth might break this enamel, and it will not grow a second time. Down in the middle of the tooth is a nerve. When the enamel is broken this nerve feels the heat and cold. Soon the tooth begins to ache. If you want this mill of yours to work well for a long time, you must take very good care of it.
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