3. Why does the heart have to pump blood?
A. To exchange the necessary nutrients
B. To collect all the waste materials from the body cells
C. To provide the necessary force for the blood to move from the lower to the upper part of the
body
D. Both b and c
4. Which part of the circulatory system carries the nutrients and oxygen in different parts of the body?
A. Arteries
B. Blood
C. Capillaries
D. Heart
5. Which of the following is the major orgnan of the circulatory system?
A. Aorta
C. Heart
B. Blood
D. Vein
6. How will you describe the heart?
A. It is an inflexible organ
C. It is a hollowmuscular organ
B. It works like a pump
D. both B and C
7. Alyssa hurt her knee. Which part of the nervous system is responsible for transmitting information
to the brain about Alyssa's hurt knee?
A. Nerve
C. Spinal cord
B. Brain stem
D. Veins
8. Which part of the brain controls your balance, movement, and coordination
A. Brain cells
C. Cerebellum
D. Cerebrum
B. Brain stem
9. Through which path does blood typically flow through the circulatory system?
C. Capillaries > arteries > arteries
A. Arteries > capillaries > veins
D Veins veins > capillaries > arteries
B. Arteries > veins > capillaries​