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

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

• pulse

• breathing

• stomach growling

Your heart is a _____________.

• tube

• muscle

• vein

Major artery at the top of the heart sends oxygenated blood from the left ventricle to the rest of the body.

• aorta
• pulmonary artery
• inferior vena cava

A) The right and left ventricles of the human heart are connected to each other.

• CORRECT

• INCORRECT

B) In the respiratory system the oxygen enters the blood and the carbon dioxide leaves the blood in the air sacs.

• CORRECT

• INCORRECT

C) The diaphragm does not move when we are inhaling (breathing in).

• INCORRECT

• CORRECT