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.

Read more about BreastEtymology, Development

Other articles related to "breast, breasts":

Breast - Cultural Aspects - Symbolism
... 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 ...
... Mastopexy (Greek μαστός mastos “breast” + -pēxiā “affix”) is the mammoplasty procedure for correcting the size, contour, and elevation of sagging ... In a breast-lift surgery to re-establish an aesthetically proportionate bust for the woman, the critical corrective consideration is the tissue ... 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 ...
La Fornarina
... 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 ...
Risk Factors For Breast Cancer - Dietary Factors - Phytoestrogens
... any noticeable benefit and some phytoestrogens may present a breast cancer risk ... the following conclusions 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 ...
Mastopexy - The Patient
... of the post-partum volume losses of fat and milk-gland tissues, and the occurrence of breast ptosis ... suspensory Cooper’s ligaments and of the breast skin-envelope (mild, moderate, severe, and pseudo ptosis) — determine the applicable restorative surgical approach for lifting the ... Grade I (mild) breast ptosis can be corrected solely with breast augmentation, surgical and non-surgical ...

Famous quotes containing the word breast:

    Now the nightingale, the pretty nightingale,
    The sweetest singer in all the forest’s choir,
    Entreats thee, sweet Peggy, to hear thy true Love’s tale:
    Lo! yonder she sitteth, her breast against a briar.
    Thomas Dekker (1572?–1632?)

    Imagine that it is you yourself who are erecting the edifice of human destiny with the aim of making men happy in the end, of giving them peace and contentment at last, but that to do that it is absolutely necessary, and indeed quite inevitable, to torture to death only one tiny creature, the little girl who beat her breast with her little fist, and to found the edifice on her unavenged tears—would you consent to be the architect on those conditions?
    Feodor Dostoyevsky (1821–1881)

    In the Cretan’s 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 (1885–1972)