1(of whale, dolphin) orificio nasal masculine(of whale, dolphin) abertura nasal feminine(of shark, ray) espiráculo masculine(of insect) estigma masculine(of insect) espiráculo masculine
- Insects ‘breathe’ through a tracheal system, with external openings called spiracles and increasingly finely branched tubules that carry gases right to the metabolizing tissues.
- There is a hole called a spiracle behind each eye.
- Catsharks have moderately large spiracles, or respiratory openings, and five pairs of gill slits.
- Its spiracles located behind the eyes allow the guitarfish to remain under the sand for long periods of time and breathe easily by flushing clean water over the gills.
- It has long been suggested that insects close the spiracles to prevent desiccation, minimizing water loss but exposing themselves to hypoxic stress.