Regeneration of the digestive system in the crinoid Himerometra robustipinna occurs by transdifferentiation of neurosecretory-like cells
Fig 2
Structure of the luminal epithelium of the digestive tube of H. robustipinna.
(A) Esophagus. (B) General view of the intestinal epithelium. (C) Apical part of the intestinal epithelium. (D) The epithelium of the rectum. (E) Coelomic epithelium of the gut. ci, cilium; cu, cuticle; ec, epitheliocyte; ga, Golgi apparatus; ge, granular enterocyte; hl, hemal lacuna; mu, mucus cell; mc, myoepithelial cell; mt, mitochondria; mv, microvilli; n, nucleus; nc, processes of nerve cells; pc, peritoneocyte; ph, phagosome; rer, rough endoplasmic reticulum; sj, septate junction; sg, secretory granules; ve, vesicular enterocyte. Scale bars: (A) 2 μm, (B-E) 4 μm.