Check for Understanding - Respiratory System

1. Which is the main organ of the respiratory system?

• Alveoli

• Heart

• Bronchus

• Lungs

What gas do we breathe in?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen

What is the function of the respiratory system?

What is the name of the tube that carries air to the lungs?

What is the process called when we breathe in oxygen and breathe out carbon dioxide?

• Respiration

• Circulation

• Excretion

• Digestion

What parts of the body are included in the respiratory system?

We have ______ lungs.

What helps to protect the lungs?

• Ribs

• Skin

• Brain

• Heart

What do we call tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged?

• Bronchi

• Alveoli

• Diaphragm

• Capillaries

What happens to our chest when we breathe in?

• It expands

• It contracts

• It stays the same

• It jumps up and down