part_of part of part of contained in develops from existence overlaps existence starts during or after material entity Stage 5 Stage 6 Stage 7 Stage 8 Category 2 cell epidermal progenitor cell Category 3 cell PMID:27013241 PMID:20040488 PMID:22439894 PMID:26651295 Planarian_Anatomy late postmitotic progeny https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4407 PMID:26114597 AGAT1 expressing cell PMID:24063805 PMID:22252539 PMID:27068018 late epidermal progenitor PMID:18786419 Category 3 gene expressing cell Post-mitotic, mesenchymally located epidermal progenitors downstream of the Category 2 cells. late neoblast progeny PMID:23954785 PMID:22899852 PMID:23629965 AGAT-1 expressing cell PMID:24367277 PMID:26457503 PMID:23318635 PMID:23297191 Smed-AGAT-1+ cell late progeny late division progeny PMID:21894189 PMID:22427692 PMID:28072387 PMID:24173799 anterior region of the whole animal dorsal region of the whole animal posterior region of the whole animal ventral region of the whole animal juvenile stage head region prepharyngeal region parapharyngeal region tail region somatic cell adult hermaphrodite asexual adult copulatory region integumental system