The breast is the upper ventral region of the torso of a primate, in left and right sides, which in a female contains the mammary gland that secretes milk used to feed infants.
Both men and women develop breasts from the same embryological tissues. However, at puberty, female sex hormones, mainly estrogen, promote breast development, which does not occur in men, due to the higher amount of testosterone. As a result, women's breasts become far more prominent than those of men.
During pregnancy, the breast is responsive to a complex interplay of hormones that cause tissue development and enlargement in order to produce milk. Three such hormones are estrogen, progesterone and prolactin, which cause glandular tissue in the breast and the uterus to change during the menstrual cycle.
Each breast contains 15–20 lobes. The subcutaneous adipose tissue covering the lobes gives the breast its size and shape. Each lobe is composed of many lobules, at the end of which are sacs where milk is produced in response to hormonal signals.
Other articles related to "breasts, breast":
... The woman is pictured with an oriental style hat and bare breasts ... She is making the gesture to cover her left breast, or to turn it with her hand, and is illuminated by a strong artificial light coming from the external ... It has been suggested that the right hand on the left breast reveals a cancerous breast tumour disguised in a classic pose of love ...
... In Christian iconography, some works of art depict women with their breasts in their hands or on a platter, signifying that they died as a martyr by having their breasts severed one example of this is Saint Agatha of ...
... the post-partum volume losses of fat and milk-gland tissues, and the occurrence of breast ptosis ... by the woman — the degrees of laxness of the suspensory Cooper’s ligaments and of the breast skin-envelope (mild, moderate, severe, and pseudo ptosis ... Grade I (mild) breast ptosis can be corrected solely with breast augmentation, surgical and non-surgical ...
... Mastopexy (Greek μαστός mastos “breast” + -pēxiā “affix”) is the mammoplasty procedure for correcting the size, contour, and elevation of sagging breasts upon the chest ... In a breast-lift surgery to re-establish an aesthetically proportionate bust for the woman, the critical corrective consideration is the tissue viability of the ... The breast-lift correction of a sagging bust is a plastic surgery operation that cuts excess tissues (glandular, adipose, skin), overstretched suspensory ligaments, and excess skin from the skin-envelope, and ...
... to establish any noticeable benefit and some phytoestrogens may present a breast cancer risk ... Plant estrogen intake in early adolescence may protect against breast cancer later in life ... The potential risks of isoflavones on breast tissue in women at high risk for breast cancer is still unclear ...
Famous quotes containing the word breast:
“This is the last leaf
in the years book.
Now I come to grief
as the earths breast goes hard and mean
and hay is packed for the manger.”
—Anne Sexton (19281974)
“Getting ready: the show girl scratches her breast and shakes out her feathers.”
—Mason Cooley (b. 1927)
“My breast waited
shy as a clam
until you came,
You with your pogo stick ...”
—Anne Sexton (19281974)