part of part of ulna proximal epiphysis epiphysis of ulna proximal epiphysis of ulna proximal end of ulna FMA:33751 caput ulnae galen:HeadOfUlna head of ulna The head of ulna presents an articular surface, part of which, of an oval or semilunar form, is directed downward, and articulates with the upper surface of the triangular articular disk which separates it from the wrist-joint; the remaining portion, directed lateralward, is narrow, convex, and received into the ulnar notch of the radius. caput ulnae UBERON:0006822 SCTID:304590006 Wikipedia:Head_of_ulna upper end of ulna