breast BTO:0000149 CALOHA:TS-2083 EV:0100124 FMA:9601 GAID:33 MESH:D001940 OpenCyc:Mx4rvVjV7ZwpEbGdrcN5Y29ycA The breasts of a female primate's body contain the mammary glands, which secrete milk used to feed infants. Both men and women develop breasts from the same embryological tissues. However, at puberty female sex hormones, mainly estrogens, promote breast development, which does not happen with men. As a result women's breasts become more prominent than men's. The upper ventral region of an animal's torso. UBERON:0000310 UMLS:C0006141 doid.owl galen:Breast mamma mammary part of chest mammary region obi.owl uberon multicellular anatomical structure