part_of part of part of contained in existence overlaps material entity Stage 6 Stage 7 Stage 8 anterior region of the whole animal dorsal region of the whole animal posterior compartment of the whole animal juvenile body wall musculature PMID:24992682 PMID:29100657 WBbt:0005813 https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4454 BSA:0000058 Planarian_Anatomy muscle layer surrounding the body wall PMID:22385657 PMID:30471994 PMID:19174194 PMID:29674432 FMA:86931 PMID:29547123 PMID:21828097 PMID:29674431 UBERON:0004462 body wall muscles body muscle BTO:0001863 BWM Any collection of muscles that is part of a body wall [Automatically generated definition]. PMID:30962434 PMID:28171748 body wall muscle PMID:19048075 body-wall musculature PMID:27063937 body-wall muscle PMID:27074666 head prepharyngeal region parapharyngeal region tail musculature system organ adult hermaphrodite asexual adult copulatory region