How does the heart pump blood?

What is the main job of the heart in the human body?

• To help you think and remember things.

• To pump blood throughout the body.

• To digest food and absorb nutrients.

• To help you breathe in and out.

What causes the "thump-thump" sound you hear when listening to a heartbeat?

• The heart expanding to take in air.

• Blood flowing smoothly through the veins.

• The heart muscle squeezing and relaxing to push blood.

• Air moving in and out of the lungs.

What type of tissue is the heart mostly made of?

• Bone

• Muscle

• Skin

• Nerve

What are you feeling when you check your pulse on your wrist?

• The movement of your bones.

• The push of blood through blood vessels from your heart.

• The vibration of your nerves.

• The air moving through your body.