This week we will be learning about the respiratory and digestive systems. The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide. It includes the nose, mouth, throat, windpipe, and lungs. The digestive system breaks down food and absorbs nutrients and water. It includes the mouth, esophagus, stomach, small intestine, large intestine, liver, pancreas, and gallbladder. We will study the structures and functions of each organ and how they work together to keep us alive.