develops_from develops from penis http://upload.wikimedia.org/wikipedia/commons/8/87/Labelled_flaccid_penis.jpg EMAPA:18682 penile galen:Penis MAT:0000186 EV:0100107 MESH:D010413 EFO:0000987 penes MIAA:0000186 Wikipedia:Penis EHDAA2:0001433 CALOHA:TS-0758 UBERON:0000989 An intromittent organ in certain biologically male organisms. In placental mammals, this also serves as the organ of urination. NCIT:C12409 VHOG:0000727 EMAPA_RETIRED:18996 EHDAA:9380 FMA:9707 GAID:389 OpenCyc:Mx4rvVjkCZwpEbGdrcN5Y29ycA BTO:0000405 UMLS:C0030851 uberon Most male birds (e.g., roosters and turkeys) have a cloaca (also present on the female), but not a penis. Among bird species with a penis are paleognathes (tinamous and ratites), Anatidae (ducks, geese and swans), and a very few other species (such as flamingoes). A bird penis is different in structure from mammal penises, being an erectile expansion of the cloacal wall and being erected by lymph, not blood. It is usually partially feathered and in some species features spines and brush-like filaments, and in flaccid state curls up inside the cloaca SCTID:265793009 phallic phallus MA:0000408 mesoderm-derived structure urogenital fold undifferentiated genital tubercle intromittent organ