part_of part of part of only in taxon only_in_taxon develops from develops from has potential to develop into has potential to develop into Amniota embryonic structure somatopleure undifferentiated genital tubercle http://upload.wikimedia.org/wikipedia/commons/d/d6/Gray1119.png The embryonic anlage of the external genitalia, which emerges as paired swellings ventral to the cloacal membrane, is proposed to be derived from all three germ layers, and gives rise to the penis, clitoris, scrotum, labia, and foreskin. undifferentiated genital tubercle Wikipedia:Genital_tubercle EHDAA:5925 FMA:302888 SCTID:308798005 EHDAA2:0000705 uberon EMAPA:17382 UBERON:0005876 VHOG:0000583 indifferent external genitalia differentiated genital tubercle