Respiratory System

Your body couldn’t breathe without this system. Which one is it?

• Perspiration system
• Respiratory system
• Photosynthesis
• Urinary system

The respiratory system is made up of the diaphragm, the lungs, and the:

• Liver

• trachea

• Esophagus

• Pancreas

These small branches of the lungs carry oxygen and carbon dioxide (CO2) in and out of the body.

• bronchioles

• sticks

• alveoli

• trachea

When you breathe in air, you bring oxygen into your lungs and blow out:

• Carbon dioxide
• Carbon monoxide
• Oxygen
• Hydrogen

What is the name of the tiny air sacs in your lungs?

• Bronchioles
• Ravioli
• Alveoli
• Bronx

The trachea is also called the:

• Lung
• Diaphragm
•  Windpipe
• Bronchus

The tiny hairs that keep mucus and dirt out of your lungs are called:

• Lung hairs
• Stubble
• Bronchioles
• Cilia

As you breathe, this contracts and flattens to give your lungs room to fill up with air:

• Larynx
• Lung balloon
• Diaphragm
• Bronchiole

Smoke that is exhaled by the smoker.

• sidestream

• upstream

• mainstream

• downstream

Tobacco smoke that comes from the end of a burning cigarette.

• mainstream

• sidestream

• upstream

• downstream