1. Choose the correct answer to each question.
1. Cells need
a. food and oxygen c. blood and food
b. water and waste d. oxygen and water
2. Blood carries
a. food and oxygen to the cells c. red and white blood
b. water and waste d. diseases
3. The Circulatory system
a. carries blood around the body c. carries waste
b. carries bile around the body d. carries food
4. Blood, blood vessels, heart
a. make up the circulatory system c. are for sell
b. makes up the skeletal system d. are not needed
5. Blood is
a. mostly water c. mostly dry
b. mostly cells d. mostly salt
6. Plasma is
a. the watery part of blood c. white blood cell
b. red blood cells d. nerve cells
7. Blood has
a. Red and white blood cells c. blue and white blood cells
b. Green and red blood cells d. white and green cells
8. Red blood cells
a. carries oxygen c. carries germs

2. b. carries oreos d. carries white blood
9. White blood cells
a. fight germs c. carries oxygen
b. fights ninjas d. carries waste
10. Arteries
a. carry blood away c. carries blood to the heart
b. carries nerve cells d. carries blood to the brain
11. Veins
a. bring blood back to the heart c. brings blood to the lung
b. brings blood back to the brain d. brings blood to the face
12. Size of the heart
a. your fist and one pound c. 6 pounds
b. your head and two pounds d. 5 pounds
13. The heart has
a. four parts c. two parts
b. three parts d. five parts
14. The heart beats
a. 70 times per minute c. 7 times per minute
b. 10 times per minute d. 100 times per minute