Body Systems

5. small arteries that deliver oxygen and nutrients to cells and pick up cells’ waste
6. blood vessels that carry oxygen-poor blood
9. body system that allows people to think, use the senses, move, and maintain important body processes
10. body system that produces chemical messengers called hormones, which regulate body processes

1. body system formed by all the structures that move blood through the body; also called the cardiovascular system
2. body system that breaks down food to provide nutrients and energy; also removes solid waste from the body
3. body system of organs that obtain vitally important oxygen from the outside world
4. hollow, muscular organ located in the center of the chest; pumps blood into the circulatory system
7. body system of organs and tissues that help fight infections
8. These carry blood away from the heart