EXAM 4th grade. Respiratory System

In respiration air enters our body through the...(choose 2)

• Nose

• Lungs

• Skin

• Mouth

What's the name of the tiny air sacs found at the end of each bronchiole?

• Alveoli

• Windpipe

• Bronchus

• Ribs

Which are the bones that protect the organs in the chest?

• Ribs

• Wings

• Intercostal muscles

• Bronchioles

It is also called the windpipe...

• The bronchus

• The alveoli

• The trachea

• The mouth

It contracts and relaxes to change the volume of the chest, causing the movement of air into and out of the lungs.

• Diaphragm

• Trachea

• Lungs

• Intercostal muscles

When we breathe in we inhale:

• Carbon dioxide

• Oxygen

• Water

• H2O

When we breathe in we exhale:

• Carbon dioxide

• Oxygen

• Water

• H2O

Which are the smaller tubes found at the end of the bronchi?

• Bronchioles

• Bronchus

• Alveoli

• Alveolus

What are the main organs of the respiratory system?

• muscles
• lungs
• nose and mouth
• bronchi

NUMBER 1:

• lungs

• pharynx

• mouth

• alveoli