human_reference_atlas Homo sapiens proximal phalanx proximal phalanx of manual digit 1 AS proximal phalanx of thumb manual digit 1 proximal phalanx proximal phalanx of first digit of hand proximal phalanx of digit of hand 1 SCTID:181992006 UBERON:0004338 manual phalanx I-1 uberon first proximal phalanx of hand proximal phalanx of digit of hand 1 thumb proximal A proximal phalanx that is part of a hand digit 1 [Automatically generated definition]. FMA:23918 proximal phalanx of manual digit I manus bone