About this Quiz

This Circulatory system Class 4 MCQ test contains random 30 Objective Questions. You have select one correct answer among given options.

Circulatory system Class 4 MCQ With Answers

1. How many types of blood vessels are in our body?

  • 1
  • 2
  • 3
  • 4

2. ______________ are the smallest blood vessels.

  • Arteries
  • Veins
  • Capillaries

3. ______________ are the second largest blood vessel.

  • Arteries
  • Veins
  • Capillaries

4. What is the Circulatory System also known as?

  • The heart
  • Cardiovascular System
  • Nervous System
  • Aorta

5. What do Red-Blood cells do?

  • Carry oxygen from the lungs to the body cells and  transport carbon dioxide from the cells back to the lungs
  • keeps blood flowing in one direction to the heart and prevent blood from flowing backwards
  • Collects  blood from the capillaries and drain it into the veins
  • Bring nutriients to the cells and carries away waste materials.

6. What does Deoxygenated mean?

  • Oxygen-rich
  • Blood flow
  • Oxygen-poor
  • Water Flow

7. Which is the correct definition of the Circulatory system?

  • The system fights disease so the body stays healthy.
  • The system that circulates blood and oxygen through the body, consisting of the heart,blood vessels,and blood.
  • Breaks down food into smaller pieces and absorbs those nutrients into the body.
  • Provides shape and structure for the body.

8. The heart has ___ chambers.

  • 1
  • 2
  • 3
  • 4

9. What does the circulatory system do?

  • pumps blood through the whole body 
  • pumps blood to the brain 
  • pumps blood to the lungs
  • pumps blood

10. What does blood do?

  • Carries Water to cells
  • Carries Oxygen to cells
  • Carries Food to cells
  • All of the above 

11. Carbon dioxide is considered a _________________

  • food
  • waste
  • energy
  • fun party favor

12. Arteries carry oxygen rich blood away from the heart.

  • True
  • False

13. What is the heart ?

  • meaty organ 
  • a small metal spike with a broadened flat head,
  • organ of soft nervous tissue 
  • muscular organ

14. Veins carry oxygen poor blood back to the heart.

  • False
  • True

15. What function does the heart do?

  • Protects organs and produces red blood cells.
  • Generates heat.
  • Breaks down food into nutrients.
  • The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.

16. Arteries, veins, and capillaries are three types of __________

  • heart valves
  • blood vessels
  • cells
  • veins

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