part_of part of part of contained in existence overlaps existence starts during or after material entity Stage 6 Stage 7 Stage 8 cephalic ganglia Planarian_Anatomy PMID:22411224 PMID:19766622 PMID:27800171 PMID:17376870 PMID:17942485 ISBN:9780070316607 bi-lobed brain PMID:21566195 PMID:16033796 PMID:24173799 PMID:17251262 PMID:29291981 PMID:28126842 https://orcid.org/0000-0003-2569-1939 | https://orcid.org/0000-0002-7535-4477 PMID:16890156 PMID:22445864 PMID:23405188 PMID:17999079 OCLC:16809160 PMID:19211673 PMID:23318641 PMID:25278423 cerebral ganglia PMID:25772472 PMID:19247960 https://doi.org/10.1101/279364 PMID:18202849 PMID:23318635 PMID:28072387 PMID:26884331 PMID:30237141 PMID:16344473 PMID:27013241 PMID:25254346 PMID:29291974 PMID:21295481 PMID:22451003 PMID:25725068 PMID:20967238 PMID:20215344 PMID:25956527 PMID:27074666 PMID:22074376 PMID:29547123 PMID:17553481 PMID:25404302 PMID:27163480 PMID:30194301 PMID:24131630 bi-lobed cephalic ganglia PMID:21282632 PMID:17905225 PMID:23235145 PMID:25356635 PMID:22125640 PMID:28287248 The planarian brain, consisting of two bilaterally symmetric lobes occupying a ventral position in the head. PMID:26017970 PMID:22339734 PMID:22549959 PMID:24238224 PMID:19048075 PMID:27612382 PMID:18287199 PMID:28216315 PMID:20844018 PMID:23297191 PMID:15866156 PMID:17670787 PMID:27612384 PMID:24415944 PMID:29674431 PMID:21806978 PMID:20422023 PMID:21179478 PMID:21458439 PMID:24950970 PMID:18063757 brain PMID:18063755 PMID:23652002 PMID:19174194 central nervous system anterior region of the whole animal dorsal region of the whole animal juvenile head organ adult hermaphrodite asexual adult