Science 5 Q4 Quiz 4 Reviewer

This is used by doctors to listen to our heart beating

• ultrasound

• electrocardiograph

• stethoscope

• x-ray

A special machine that reads electrical signals made by your heart's pacemaker

• ultrasound

• electrocardiograph

• stethoscope

• x-ray

The ___________ system that transfers blood throughout the body.

The main organ of the circulatory system

• blood vessels

• lungs

• blood

• heart

The heart is located between the _____

True or False: The heart is a muscle.

• True

• False

True or False: Blood flows in two directions.

• True

• False

The heart has ____ empty chambers

The upper chambers of each side of the heart are called

• ventricle

• atrium

• septum

• valve

The lower chambers on each side of the heart are called

• ventricle

• atrium

• septum

• valve