Spiracle
- Pronunciation
- /SPY-ruh-kuhl/
- Category
- Anatomy
- Singular
- Spiracle
- Plural
- Spiracles
Definition
External openings found on the exoskeleton of insects and some arachnids that allow for the intake and expulsion of air for respiration.
Etymology
From Latin 'spiraculum', meaning 'air hole', which is derived from 'spirare', meaning 'to breathe'.
Example
The spiracles of a grasshopper are located along the sides of its body, facilitating respiration.
Synonyms
- Breathing pore
- Air hole
Related Terms
- Trachea
- Respiration
- Exoskeleton
Usage Notes
Spiracles can have valves to regulate the opening and closing to prevent water loss and can vary in number and position depending on the species.