Mammary glands lie on the pectoral muscles, and outside are covered, as well as all of our body, skin, heavily pigmented areola of the nipple on the hill, which is of special significance among the female erogenous zones! And all because this soft pink 4-inch circle downright packed with sensitive nerve endings. Even the nipple skin is rich in smooth muscle fibers that are to blame for the fact that in answer to the excitation of the nipple becomes high and tight, giving the woman's condition.
The development of the mammary glands during puberty is mainly influenced by estrogen. This is the main female sex hormone responsible for secondary sexual characteristics. It should be noted that very often during the development of mammary glands, they may be of irregular size.
The size of mammary glands in women may increase during puberty and during pregnancy.
In addition, obesity is marked as breast augmentation, as almost half of the mammary gland is composed of fatty tissue. In the case of rapid enlargement of the mammary glands on the surface appear the signs of tension. Usually occurs during pregnancy, and other changes in the mammary gland: in addition to increasing their size, they become denser. This is due to hypertrophy of the mammary gland through the influence of the hormone prolactin. In addition, the increased size of the nipples, they become darker. These changes may persist during lactation.
After the end of the period of pregnancy and lactation breast size is almost the same, although on the surface may remain stretching. Also, the size of the breast changes during the menstrual cycle, due to water retention in women.
Breast augmentation - a side effect of taking combined oral contraceptives. With age, breasts become stretched and become saccate form, which is associated with a sprain Cooper.
The first signs of puberty in girls occur at about the age of ten years - some increase in the amount of the nipples, areola swells and begins to lightly granted, and after that develop fatty breast tissue, resulting in a nipple "lifted." In the next few years, growing breasts, and they are rounded, nipple flattening, and the nipples become darker. In some cases, a mammary gland begins to develop before the other, and sometimes the difference in the amount retained in the adult female.
The formation of breast cancer - is part of puberty, respectively, after a while comes first menstruation. Puberty - is a psychological test, so the girls are important, timely and properly filed with the information about running processes in her body, enabling it to react to change.
Normally developed female breasts are at a level III-VI or VII of the edges at least, each approximately between the sternum and the anterior axillary line of the party. The mammary gland is located on the chest wall in such a way that covers a significant portion of the pectoralis major muscle, and even part of the anterior serratus muscle. In the center of the breast is the nipple, the nipple is surrounded by the areola - pigmented skin. The mammary gland is covered with soft leather. The skin covering the nipple and the nipple field, distinguished by a special affection and has a large number of small folds, resembling in form wrinkles. The skin color is different: it can be pink or brown depending on the overall pigmentation of the skin. During pregnancy, the intensity of pigmentation of the nipple and most of the field the nipple of the breast increases.
By the nipples are milk ducts of the mammary glands. Mammary glands, the so-called bubbles, connected to the glandular lobules, resembling bunches of grapes. Taken together, form a department called the Department of glandular distinguishing breast milk.
Shares of breast arranged radially with respect to the nipple, and their number can vary from 15 to 20. They are surrounded by loose connective tissue and fat, which makes the mobility of the breast on his base. These tissues are largely determine the outer shape of the breast. Each share represents the alveolar-tubular gland with ducts, opening at the top of the nipple. Before going to the nipple ducts dilate and form lactiferous sinuses. Glandular tissue is kept in an appropriate position of the so-called "Cooper's ligament." Support for the entire chest are the pectoral muscles, which in turn is attached to the ribs. Same natural "frame" is a skin condition on her, too, depends on the appearance of the breast. Mammary glands are permeated a lot of blood vessels and lymph channels, efferent lymph from the breast. Lymph flow is in the armpits, in the subclavian and the supraclavicular region. Another line runs along the outflow of the thoracic vessels, connecting with the thoracic nodes.
The structure of the mammary gland varies considerably in different age stages, during menstruation, pregnancy, lactation. These changes are regulated by the activity of endocrine glands. Weight of cancer in women ranges from 150-200 g, 300-900, the period of lactation by the end of the lactation period in the amount of iron is reduced due to the inverse of the constituent elements of the glandular part of it, but not as much as it was before pregnancy.