The polypide in bryozoans encompasses most of the organs and tissues of each individual zooid.
This includes the tentacles, tentacle sheath, U-shaped digestive tract, musculature and nerve cells.
It is housed in the zooidal exoskeleton, which in cyclostomes is tubular and in cheilostomes is box-shaped.
Polypides can undergo cycles of regression and regeneration, in which the zooid forms a new polypide as the old one accumulates waste and dies.
[1] Bryozoan Anatomy This bryozoan-related article is a stub.