Our class has been learning about the human body! Each grade level studies one or more body systems as part of the Core Knowledge sequence. In second grade, our focus is on the digestive and excretory systems. We began by learning about the cell, the basic building block of living things. We then discussed the place where digestion begins, the mouth. Students learned the functions of the different types of teeth (incisors, canines, bicuspids, and molars) and how they work with the tongue and salivary glands to begin breaking down food. As we discussed each organ, students compiled the information that they learned in a booklet about the human body. They learned the functions and locations of the stomach, small intestine, large intestine, liver, kidneys, and bladder. We ended this unit by discussing the food groups and eating nutritionally balanced meals.