scrotum BTO:0003098 CALOHA:TS-2341 EMAPA:19296 FMA:18252 GAID:393 In elephants the testes remain in the abdomen In hedgehogs the testes remain in the inguinal canal In humans and some other mammals, the base of the scrotum becomes covered with pubic hair at puberty In marsupials, the scrotum is not homologous to the eutherian scrotum, and development is under the control of X-linked genes, not androgens In marsupials, the scrotum is positioned in the caudal area of the abdomen, in the same position as the pouch in females. It has been suggested that the pouch and marsupial scrotum are sexual homologs, but it is more likely they arise from different primordia in the same morphogenetic field MA:0000409 MESH:D012611 NCIT:C12785 OpenCyc:Mx4rwUC_upwpEbGdrcN5Y29ycA The scrotum of marsupials is not homologous with the scrotum of mammals[ISBN:113945742X] UBERON:0001300 UMLS:C0036471 galen:Scrotum scrotal the external sac of skin that encloses the testes. It is an extension of the abdomen, and in placentals is located between the penis and anus. uberon mesoderm-derived structure mesoderm-derived structure 中胚层衍生结构 reproductive structure reproductive structure 生殖结构 external soft tissue zone external soft tissue zone 外部软组织区域