Circulatory and Respiratory System

What is the main organ of our circulatory system?

The main organ of the respiratory system is the _______.

How many chambers does the heart have?

• 1

• 2

• 3

• 4

The part of the blood that helps you stop bleeding when you cut yourself is called __________.

• red blood cells

• platelets

• plasma

• white blood cells

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

• red blood cells

• white blood cells

• platelets

• plasma

The part of the blood that fights off harmful bacteria and viruses is called ________.

• red blood cells

• white blood cells

• platelets

• plasma

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

• carbon monoxide

• carbon dioxide

• nitrogen

• oxygen

We breathe out ________ when we exhale.

• carbon monoxide

• carbon dioxide

• helium

• oxygen

They connect arteries and veins

• circulatory system

• The lungs

• The heart

• The capillaries

This takes in oxygen-poor blood from the body

• Right Atrium

• Left Atrium

• Right Ventricle

• Left Ventricle