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A three-branched intestine runs across almost the entire body, and includes a single anterior and two posterior branches. The planarian intestine is a blind sac, having no exit cavity, and therefore planarians uptake food and egest waste through the same orifice, located near the middle of the ventral body surface. [5]
Microplana is a genus of land planarians found in Europe and Africa. [1] Description ... connecting the intestine to the female atrium. [2] Ecology
The genus Kontikia includes planarians of elongate body, with a creeping sole that occupies one to two thirds of the body width. The mesenchymal musculature includes well-developed longitudinal muscles forming a ring zone around the intestine. [2]
Alejandro Sanchez-Alvarado and Philip Newmark transformed planarians into a model genetic organism in the beginning of the 20th century to study the molecular mechanisms underlying regeneration. [12] Morgan found that a piece corresponding to 1/279th of a planarian [ 11 ] or a fragment with as few as 10,000 cells could regenerate into a new ...
The complete mitogenome of Caenoplana coerulea is 18,621 bp in length. [7] Its main characteristic is a cytochrome c oxidase subunit 2 gene of unusual length, with a cox2 encoded protein 505 aa in length (compared to about 250 aa in other geoplanids); this characteristic of a very long cox2 is also found in other members of the subfamily Rhynchodeminae, to which Caenoplana coerulea belongs.
The eye cup in Dugesiidae is composed of several retinal cells, while in other freshwater planarians they are composed of a single cell. [4] All freshwater planarians have an accessory organ called copulatory bursa or bursa copulatrix, which is connected to the genital atrium by a canal. In Dugesiidae, the oviducts, which conduct the eggs from ...
Schmidtea mediterranea, model planarian facts, life cycle, anatomy at GeoChemBio This page was last edited on 20 December 2023, at 19:31 (UTC). Text is available ...
Planariidae is a family of freshwater planarians. The type genus is Planaria Müller, 1776. [1] Genera. Twelve genera of Planariidae are known: [2] Atrioplanaria;