Three Body Systems
This Chapter is about the Circulatory, Digestive, and Skeletal Systems. The Circulatory System is the system where the blood through your body. The main parts of this system is the heart, lungs, and veins. Now the lungs seem like they aren't but they really are because the pulmonary blood flow, go to the lungs and back so the blood can carry the oxygen all over the body. Digestive breaks down food and absorbs the nutrients from the food. The important parts of this system is enzymes, liver, large and small intestine, pancreas, and the anus. The skeletal system is the support and blood cell maker for the body. There are 206 bones in your body. These bones start out as about 400 bones. They get push together to make a one bone.