Spiracle
- Pronunciation
- /STIG-muh/
- Category
- Anatomy
- Singular
- Stigma
- Plural
- Stigmata
Definition
A small, usually circular, respiratory opening located on the exoskeleton of insects, allowing for gas exchange.
Etymology
From Greek 'stigma', meaning 'mark' or 'spot'.
Example
The caterpillar breathes through spiracles located along the sides of its body.
Synonyms
Related Terms
- Tracheae
- Respiratory system
- Exoskeleton
Usage Notes
Stigmata are crucial for the insect's respiration and are typically arranged in pairs on each segment of the body.