How do our lungs breathe in air?

How do our lungs breathe in air

Our lungs breathe in air through a process called inhalation. When we inhale, the muscles around our lungs, especially the diaphragm, contract and expand the chest cavity. This expansion creates a vacuum, causing air to flow in through our nose or mouth, down the trachea, and into our lungs to fill the space.



1. What do we call the process of taking air into the lungs?

A) Digestion
B) Inhalation
C) Photosynthesis
D) Exhalation


2. What happens to the diaphragm when you inhale?

A) It relaxes and moves up
B) It contracts and moves down
C) It stays still
D) It disappears


3. Which part of your body helps you to breathe?

A) Heart
B) Lungs
C) Stomach
D) Brain


4. What is the name of the tiny air sacs in the lungs where oxygen is exchanged with carbon dioxide in the blood?

A) Ventricles
B) Alveoli
C) Arteries
D) Veins


5. What muscle separates the chest cavity from the abdominal cavity and plays a major role in breathing?

A) Biceps
B) Heart
C) Diaphragm
D) Spine


6. What do we call the tiny hairs inside the nose that help filter out dust and germs?

A) Cilia
B) Fingers
C) Whiskers
D) Spikes


7. What is the main purpose of breathing?

A) To eat
B) To sleep
C) To get oxygen into the body
D) To listen


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