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 "breast, breasts":
... the post-partum volume losses of fat and milk-gland tissues, and the occurrence of breast ptosis ... laxness of the suspensory Cooper’s ligaments and of the breast skin-envelope (mild, moderate, severe, and pseudo ptosis) — determine the applicable restorative ... 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 ... 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 nipple-a ... 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 ...
... 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 ...
... Research failed to establish any noticeable benefit and some phytoestrogens may present a breast cancer risk ... 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:
“My breast waited
shy as a clam
until you came,
You with your pogo stick ...”
—Anne Sexton (19281974)
In the Cretans phrase, with the golden crown, Aphrodite,
Cypri munimenta sortita est, mirthful, oricalchi, with golden
Girdles and breast bands, thou with dark eyelids
Bearing the golden bough of Argicida.”
—Ezra Pound (18851972)
“If in the world there be more woe
Than I have in my heart,
Whereso it is, it doth come fro,
And in my breast there doth it grow,”
—Sir Thomas Wyatt (1503?1542)