A specialized accessory gland of the skin of mammals that secretes milk. The gland is typically only developed in females, and regresses in males.
Comment:
[homology-note] "The detailed similarities of mammary glands in living monotremes, marsupials, and eutherians argue for a monophyletic origin of these glands, perhaps by the combination of parts of preexisting sebaceous and sweat glands.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000398", ontology="VHOG", source="ISBN:978-0072528305 Kardong KV, Vertebrates: Comparative Anatomy, Function, Evolution (2006) p.224", source="http://bgee.unil.ch/"}; [taxon-note] "A mouse mammary gland contains a single duct or sinus, forming 5-10 secondary ducts"; [taxon-note] "The male Dayak fruit bat has lactating mammary glands"; [taxon-note] "The mammary glands of humans are in the thoracid/breast region. In other mammals they may be located elsewhere on the mammary ridges."
Synonyms:
exact_synonym:
lactiferous gland
narrow_synonym:
lobe of breast; milk patch
related_synonym:
Brustdruese; dug; glandula mammaria; lobe of mammary gland; mamma; mammae