Atriopore

Definition

The atriopore is an external opening in some chordates, specifically cephalochordates like amphioxus, through which water exits the body after passing through the pharyngeal slits. It plays a key role in their filter-feeding system and respiratory process.

5 Must Know Facts For Your Next Test

1. The atriopore is found in cephalochordates such as lancelets or amphioxus.
2. It allows water to exit the body cavity after filtering through the pharyngeal slits.
3. It is part of the atrium, a chamber that collects water before it exits through the atriopore.
4. The atriopore helps maintain efficient respiration and feeding by preventing backflow of filtered water.
5. Its structure and function are critical for understanding basic chordate anatomy and physiology.

Related terms

Pharyngeal Slits: Openings in the pharynx that allow water to pass out of the body after filtering out food particles.

Cephalochordate: A subphylum of chordates that includes organisms like lancelets or amphioxus, which possess an atriopore.

Atrium:

A cavity or chamber in cephalochordates where water collects before exiting through the atriopore.