What Happens During Normal Breathing?

Topics: Respiratory Care - Chest Wall disorders

To find out what could be affecting your ability to breathe properly, it’s helpful to first understand what normal breathing looks like.

Breathing is automatic

It might sound simple, but it’s important to realize that breathing is not something we have to consciously remember to do. It’s a reflex that is controlled by nerve cells in the brain and spine.

The upper and lower airways

The respiratory system is made up of 2 parts: the upper and lower airways.

Upper airway


Lower airway


The lower airway is protected by the chest cavity, which also contains the heart and lungs.

The breathing process

What starts the breathing process is actually the effort you make (from your chest) to draw air into your body.

When you breathe, the air entering your nose is cleaned, warmed and moistened. It then travels through your throat to the windpipe, and down to the bronchi in the lungs.

As you inhale and exhale, your chest and ribs expand and contract to allow for the air going in and out.

Abnormal breathing

As you can imagine, the everyday act of breathing can become very difficult if you have a respiratory condition that affects the muscles, nerves, reflexes or organs involved in breathing.

Learn more about respiratory conditions:

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