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1. cell The basic building block of life 2. tissue A group of cells of the same type 3. organ A group of tissues of different kinds working together to perform a task A group of organs working together 4. organ system 5. circulatory system 6. artery A body system made up of the heart, blood vessels, and blood. The heart pumps blood through blood vessels in the body. The blood carries food, oxygen, and wastes. A blood vessel that carries blood away from the heart 7. vein A large blood vessel that returns blood into the heart 8. capillaries Very small blood vessels 9. skeletal system A body system made of bones that protect the body organs and give shape and support A body system made of muscles that contract and relax to move body parts 10. muscular system 11. heart 12. spinal cord 13. nerve 14. digestive system 15. respiratory system 16. nervous system 17. brain The muscle that pumps blood through blood vessels to all parts of the body The tube of nerves that run through your spine, or backbone A group of neurons that carries signals from the brain to the body and from the body to the brain A body system made of the stomach, small intestine, and large intestine which changes food so it can be used as energy by the body A body system that is made up of lungs which bring oxygen into the body and gets rid of carbon dioxide A body system that is made of the brain, spinal cord, and nerves which send and receive messages to all parts of the body The control center of your nervous system Cerebrum-speaking, remembering, problem solving, and senses Cerebellum- balance, posture, and coordination Brain stem- heartbeat, breathing, and digestion 18. lungs The main organs of the respiratory system