part_of part of part of contained in develops_from develops from existence overlaps existence starts during or after material entity anatomical entity anatomical entity Stage 5 Stage 6 Stage 7 Stage 8 epidermal progenitor cell epidermis PMID:28216315 PMID:29906446 PMID:27501047 PMID:20511647 PMID:25772472 PMID:23297191 PMID:20865784 PMID:28686611 PMID:15866156 PMID:24922054 PMID:27240733 epidermal layer PMID:27612384 PMID:19247960 PMID:18786419 PMID:29674432 PMID:29674431 OCLC:16809160 PMID:22252539 A single cell layer of post-mitotic epithelial cells containing ciliated and non-ciliated cell types forming the exterior surface of the animal. PMID:21295483 PMID:27150006 PMID:30962434 PMID:24950970 At present, this definition does not apply to epithelial structures other than the dorsal and ventral epidermis (i.e., the pharyngeal epithelium). PMID:21179478 PMID:26711341 PMID:30282036 ISBN:9780070316607 epidermis PMID:28976975 PMID:20215344 PMID:27163480 PMID:29100657 Planarian_Anatomy definitive epidermis PMID:24173799 PMID:27034770 PMID:29273738 PMID:30194301 PMID:28757112 PMID:20599901 PMID:22549959 PMID:23954785 PMID:19048075 PMID:28292427 PMID:25558068 PMID:24120894 PMID:21282632 tegument epithelium PMID:19852954 PMID:26457503 PMID:28245923 https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4569 PMID:27074666 PMID:26651295 PMID:16311336 PMID:26114597 mature epidermis PMID:29158443 PMID:28137894 PMID:23235145 anterior region of the whole animal dorsal region of the whole animal posterior compartment of the whole animal juvenile head prepharyngeal region parapharyngeal region tail organ adult hermaphrodite asexual adult copulatory region integumental system