What is the upper chamber

of the heart?

What is the lower chamber

of the heart?

What is the thick tissue wall

that separates

the left and right sides

of the heart?

What is the thin flap of tissue

that acts like a

one-way door? 

It stops blood from flowing backward.

What is the main organ

of the circulatory system?

What is the job

of your heart?

How many chambers

is the heart divided into?

four

1) right atrium

2) right ventricle

3) left atrium

4) left ventricle

right atrium (from the body)

left atrium (from the lungs)

right ventricle (to lungs)

left ventricle (to body)

Which has thicker walls:

ventricles or atria? Why?

ventricles

because they need to work harder

to pump blood

to all parts of the body

What causes

the sound

of a heartbeat?

It is the rhythm of you heart

as it pumps blood.

The "lub-dub" sound is the

opening and closing of the valves.

What is the tool used  

to listen to

your heartbeat?