Nasal cycle

Rarity: Common

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Notion

Domain

Science and technology

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What Wikipedia says

The nasal cycle is the subconscious alternating partial congestion and decongestion of the nasal cavities in humans and other animals. This results in greater airflow through one nostril with periodic alternation between the nostrils.

Excerpt from the Wikipedia article “Nasal cycle”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Simplicius, CC BY-SA 3.0, via Wikimedia Commons.