Kendall, Grade 5 Science week 13

The enamel is the outer layer of your tooth.  It also happens to be the hardest substance in your body.  The dentin is the bottom part of your tooth.  Saliva protects your teeth, gives taste to your food, protects your stomach from infection, and is the beginning of digestion.  Chyme is the name of the food when it enters the small intestine.  The small intestine is the end of digestion and sends minerals to the bloodstream.  Mucus will be produced and food will be guided down the esophagus into the stomach.  Your esophagus is the pipe that your food goes down.  Your kidneys take the salt and water and any other thing that would be from the blood and passes it to the urine.