2. a. Pumps blood into your body. b. Takes air into your body. c. Controls what your body does.

3. a. Cerebellum b. Cerebral Cortex c. Brain Stem d. Hippocampus

4. a. Cerebral cortex b. Hippocampus c. Cerebellum d. Thalamus

5. a. Respiratory System b. Nervous System c. Circulatory System d. Digestive System

6. a. Respiratory System b. Nervous System c. Circulatory System d. Digestive System

7. a. Pumps blood into your body. b. Takes air into your body. c. Controls what your body does.

8. a. Blood vessels that carry blood away from your heart. b. Pathways that lead to and from your brain. c. Blood vessels that carry blood toward the heart.

9. a. Blood vessels that carry blood away from your heart. b. Pathways that lead to and from your brain. c. Blood vessels that carry blood toward the heart.

10. a. Blood vessels that carry blood away from your heart. b. Pathways that lead to and from your brain. c. Blood vessels that carry blood toward the heart.

11. a. Ankle b. Fist c. Thumb d. Lungs

12. a. Pumps blood into your body. b. Take air into your body. c. Controls what your body does.

13. a. Digestive System b. Nervous System c. Circulatory System d. Respiratory System

14. a. Blood b. Oxygen c. Carbon dioxide d. Water Oxygen Carbon dioxide

15. a. Brain b. Heart c. Lungs d. Veins

16. a. Bone b. Muscle c. Nerve