Grade 3 Science - Human Body

What does the heart do?

• It pumps our blood.

• It drinks our blood.

• It makes our blood.

• It cools our blood.

The heart is ___________ of our chest.

• in the middle

• on the left

• on the right

• at the top

The heart is ___________.

• a bone

• very hard

• a muscle

• very small

Where does your food go?

Which is the correct order?

• 1. mouth

  2. stomach

  3. throat

  4. intestines

• 1. mouth

  2. throat

  3. intestines

  4. stomach

• 1. mouth

  2 intestines

  3. throat

  4. stomach

• 1. mouth

  2. throat

  3. stomach

  4. intestines

What are these?

• intestines

• stomach

• lungs

• balloons

Why are lungs important?

• We need them to eat.

• We need them to move.

• We need them to breathe.

• We need them to sleep.

What does our blood take from our lungs to our muscles?

• oxygen

• water

• air

• messages

What do muscles do?

• They help us to study.

• They help us to move.

• They help us to sleep.

• They help us to think.

Where are your muscles?

• In our arms and legs.

• In our head.

• In our chest and belly.

• Everywhere in the body.

About how much of your weight is your muscles?

• About a 1/4

• About 1/2

• About 3/4

• All of it