respiratory and circulatory system

The __________ system carries oxygen and nutrients to all parts of our bodies?

• respiratory

• circulatory

What does the circulatory system help our blood carry away from our body?

• oxygen

• hydrogen

• carbon dioxide

• helium

What is the main organ of our circulatory system?

• heart

• lungs

• skin

• liver

How many chambers does the heart have?

• 1

• 2

• 3

• 4

What makes the heartbeat sound we hear?

• ventricles squeezing blood.

• circulating blood

• valves opening and closing

• heart muscle contracting

What do we call the smallest blood vessels in our bodies?

• atoms

• capillaries

• tissues

• cells

The part of the blood that carries oxygen is called ________.

• red blood cells

• white blood cells

• platelets

• plasma

The large artery that brings blood from the heart to the lungs is called the ___________.

• vein

• ventricle

• pulmonary artery

• capillary

When we breathe in, our bodies use _________ to live.

• carbon monoxide

• carbon dioxide

• nitrogen

• oxygen

The main organ of the respiratory system is the _______.

• lungs

• heart

• liver

• arteries and veins