title: On the excretory system of the rotifer Habrotrocha rosa Donner.
abstract: The excretory system of Habrotrocha rosa consists of two protonephridia. From each of them seven tubules lead to a terminal organ, also called cyrtocyte. Its weir basket contains structures which resemble ciliary rootlets. The lumen of the excretory system is bordered by a syncytial layer of cytoplasm. Cells are only found in the upper region of the trunk, where the channel is twisted several times.
mesh_terms: D000818:Animals; D006376:Helminths / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D008953:Models, Anatomic; D014551:Urinary Tract / Q000033:anatomy & histology / Q000648:ultrastructure; D014882:Water-Electrolyte Balance