Proto-Altaic: *ǯŭ̀r(V)k`e ( ~ -i̯u-)
Meaning: heart, inner organ
Russian meaning: сердце, внутренний орган
Comments: KW 483-484, Владимирцов 188, АПиПЯЯ 282. One cannot exclude Mong. being borrowed from Turkic (see Щербак 1997, 126), but there are no special reasons for that.