Morphologically the breast is a cone, with the base at the chest wall and the apex at the nipple, the center of the nipple-areola complex.The superﬁcial tissue layer (superficial fascia) is separated from the skin by 0.5–2.5 cm of subcutaneous fat (adipose tissue).
Upon childbirth, the alveoli are stimulated to produce and secrete milk for infants.
Along with their function in feeding infants, female breasts have social and sexual characteristics.
At puberty, estrogens, in conjunction with growth hormone, cause breast development.
Males do not develop pronounced or physiologically matured breasts because their bodies produce lower levels of estrogens and higher levels of androgens, namely testosterone, which suppress the effects of estrogens in developing breast tissue.
In females, it serves as the mammary gland, which produces and secretes milk and feeds infants.