The Human Body Quiz

Grade 2 · Science · Quiz

Test your knowledge of body systems and how they keep you healthy!

Questions

  1. How many bones does an adult human body have?

    1. 100
    2. 150
    3. 206
    4. 300
    Show answer

    Answer: 206

    An adult human body has 206 bones. Babies are born with around 270 that fuse as they grow.

  2. The lungs are part of the respiratory system.

    Show answer

    Answer: True

    The lungs are the main organs of the respiratory system, where oxygen enters the blood and carbon dioxide is removed.

  3. Your ___ pumps blood throughout your entire body.

    Show answer

    Answer: heart

    The heart is a muscle that pumps blood continuously through blood vessels to every part of your body.

  4. Where does digestion begin?

    1. In the stomach
    2. In the intestines
    3. In the mouth
    4. In the lungs
    Show answer

    Answer: In the mouth

    Digestion begins in the mouth when you chew food and mix it with saliva, which starts breaking it down.

  5. Muscles can push bones — they never pull.

    Show answer

    Answer: False

    Muscles can only PULL, not push. They contract (shorten) to pull bones, causing movement.

  6. What does the skeletal system protect?

    1. Food
    2. Internal organs
    3. Air
    4. Blood only
    Show answer

    Answer: Internal organs

    Bones form a protective cage around vital organs — your ribs protect your heart and lungs, and your skull protects your brain.

  7. Substances from food that give the body energy and help it grow are called ___.

    Show answer

    Answer: nutrients

    Nutrients are substances in food (like carbohydrates, proteins, vitamins) that the body uses for energy and growth.

  8. Exercise helps your muscles and bones stay strong.

    Show answer

    Answer: True

    Physical exercise builds muscle strength, keeps bones dense, and supports overall health.

  9. Which system is made up of the heart and blood vessels?

    1. Skeletal system
    2. Digestive system
    3. Respiratory system
    4. Circulatory system
    Show answer

    Answer: Circulatory system

    The circulatory system consists of the heart, blood vessels, and blood, and delivers oxygen and nutrients throughout the body.

  10. The ___ system uses muscles to help you move your body.

    Show answer

    Answer: muscular

    The muscular system is made of hundreds of muscles that pull on bones to produce all body movement.

Get a personalized course on The Human Body built around your child.