GIZMO Circulatory System

How many chambers does the heart have?

• Four

• Five

• Three

• Two

The tiny “doors” that open and close as blood is pumped through the heart are called ______________.

• valves

• gate

• regulator

• duct

The heartbeat sound happens in two parts of the heartbeat, nicknamed _________________.

• “lub” and “dub.”

• "boop" and "snoop"

• "blip" and "blop"

T/F - The “lub” sound is caused by valves from the atria to the ventricles closing.

• True

• False

T/F - The “dub” sound is caused by the valves from the ventricles to the blood vessels closing.

• True

• False

Why do you think the left atrium and left ventricle are shown on the right side of the diagram?

Answer explanation

[The directions are reversed because the diagram shows a person facing you.

Starting at the right atrium, in what order does blood flow through the four chambers?

• right ventricle, left atrium, left ventricle

• right atrium, right ventricle, left ventricle

• left ventricle, right ventricle, right atrium

Where does blood from the right ventricle go?

• The lungs

• Through the body

Where does blood from the left ventricle go?

• To the lungs

• Through the body

The syringe in the image is taking blood from the left atrium. The level of oxygen in the blood should be...

• high

• low

• not enough data