circulatory system

What does your heart do?

• pumps blood through your body

• protects your body

• helps your exercize

Blood carries ____________ to the heart.

• vitamins

• germs

• oxygen

Your heart pumps blood throughout your entire body through little tubes called _____________.

• veins

• arteries

• hoses

Blood is carried back to your heart in little tubes called ____________.

• veins

• arteries

• hoses

What does circulate mean?

• pump blood

• beat quickly

• go around and around

You can feel your heart beating when you feel your _____________.

• pulse

• breathing

• stomach growling

Which describes all the parts of the circulatory system?

• heart, lungs, stomach, muscles

• heart, blood, arteries, and veins

• bones, skin, hair

Ana measured her heart rate when she was resting.

It was 80 beats per minute. Immediately after carrying out an activity,

she measured her heart rate again. It was 125 beats per minute.

Which of the following activities did Ana carry out?

• Switching on the stove

• Folding a paper boat

• Playing badminton with her brother

• Sketching a picture

A woman is running in a race. Which of the following statements are true about the woman as she runs?

A. Her blood circulates at a higher rate.

B. Her body produces less carbon dioxide.

C. Her heart beats faster.

D. Her body needs more oxygen.

• A and D only

• B and C only

• A, C and D only

• B, C and D only

Identify the structure pointed by the arrow

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle