Physical gill
- Pronunciation
- /fiz-i-kal gill/
- Category
- Anatomy
- Singular
- Physical gill
- Plural
- Physical gills
Definition
A physical structure used by aquatic insects to breathe underwater, consisting of a dense vestiture of hydrophobic hairs that traps a thin layer of air.
Etymology
From the Latin words 'physicus' meaning 'physical' and 'gill', referring to a breathing organ.
Example
Some aquatic larvae possess physical gills, which allow them to extract oxygen from water.
Related Terms
- Tracheal system
- Aquatic larvae
- Air supply
Usage Notes
Physical gills can be temporary or permanent. Permanent ones are called plastrons.