Science Quiz Circulatory System

Which of the following is NOT part of the circulatory system?

• heart

• lungs

• blood vessels

• blood

What is the hollow organ with strong muscle walls?

• heart

• lung

• stomach

• pancreas

Which side of the heart pumps blood to the lungs?

• right

• left

What do we call the unidirectional (one direction) movement in blood vessels?

• heart rate

• pulse

• blood flow

What do we call the number of heartbeats per minute?

• heart rate

• pulse

• blood flow

What do we call the blood pushed through vessels per heartbeat?

• heart rate

• pulse

• blood flow

What is a tissue flap that prevents blood backflow?

• epiglottis

• sphincter

• Valve

What is a group of cells that regulate heart rhythm?

• atrium

• ventricle

• pacemaker

What is the lower heart chamber called?

• atrium

• ventricle

What is the upper heart chamber (A for Above)?

• atrium

• ventricle