epithelial cell gland cell PMID:29674431 PMID:23318635 secretory gland cell PMID:28807897 https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4625 PMID:20865784 ISBN:9780070316607 PMID:30962434 Planarian_Anatomy Specialized insunk epithelial cells located in the mesenchyme that participate in mucus secretion. They are characterized by elongated cell bodies with long cytoplasmic projections that terminate between, or penetrate directly throughepithelial cells and form a secretory pore at the surface. PMID:24737865 PMID:19247960