part of part of located_in develops_from has potential to develop into ectoderm proctodeum AAO:0011087 An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.[TAO] EHDAA2:0000121 EMAPA:25038 FBbt:00000123 Inward fold on the surface of the embryonic ectoderm that develops into an ectodermal terminal part of the digestive tract. Inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.[AAO] TAO:0000066 UBERON:0000931 UMLS:C0231054 VHOG:0000139 XAO:0001019 ZFA:0000066 amnioproctodeal invagination anal pit anus porus embryonic proctodaeum proctodaeum proctodeal removed WBbt:0006795 'proctodeum' - junction between the alimentary and genital tracts in the male. uberon anal region presumptive gut external anal region pit