What are human breasts made of?

He said, to be exact, the breast is a skin gland. However, when we understand the common profound changes in the breast, we have to admit that this is a human organ that cannot be compared with other human organs. What is a normal breast? Let's pay attention to its formation and development.

Basic structure concept

The classic concept of skin is that skin is the sum of the basic units of two kinds of glands-sebaceous glands and sweat glands.

Breast is a well-developed and well-differentiated sweat gland type skin gland, which has the special function of secreting milk. On self-aged embryos, there is a "mastoid" on the armpit thigh line, which constitutes the breast contour. Slowly, it can be observed that several pairs of early bud tissues of the breast appear, and the breast will come from the fourth pair of bud tissues. Other bud-like tissues gradually disappear.

During the life in the uterus, the structure of the breast develops, and each mammary duct constitutes a basic and tiny breast respectively, and is connected between the mammary duct and the surface vault of the early breast bud tissue. In the uterus, between the eighth and ninth months of the embryo, nipples appear. By the time of birth, the number of basic units of the breast is increasing and the development is quite active. After birth 15 days, the breast is in a dormant state. Until puberty. The mammary glands will consist of ten to twenty mammary glands, and each of these mammary glands will end in a milk duct, that is, a duct for conveying milk. Every breast has its own function. It is divided into lobules and then into a large number of honeycomb tissues-acini.

The breast receives a lot of arterial blood. During pregnancy and lactation, the superficial venous network is particularly clear. Draw a blue bifurcation network on the breast.

Generally speaking, the breast is connected by many lymphatic vessels, most of which relay in axillary lymph nodes. This is why axillary lymph nodes will be rapidly invaded by cancer cells if there are cancer cells in the blood. Breast blood network is developed. The blood distribution of puerperal women is far less developed than that of puerperal women. However, in adolescence, people noticed that the globular breast was rapidly enlarged, the areola was prominent and the pigment was deposited. After menarche, connective tissue is infiltrated by fat components. Because the nipple protrudes, the protruding amount of areola decreases. The breast becomes hemispherical, and the mammary gland becomes firm, elastic and has no secretory function.

Breast structure

The structure of mammary gland changes with different periods of women's life. Before puberty, the basic changes are:

Development and bifurcation stage of excretory duct;

The developmental stage of secretory part;

A lot of fatty connective tissue.

Mammary membrane (capsule)

In the whole breast, people can only find a little muscle tissue in areola and nipple. It is these small muscles that explain why nipples stand up under various stimuli. Nipples are often called "convex heads". Standing in the center of areola is a rough conical projection. It is as small as a mulberry and as big as a thimble for sewing clothes. Sometimes it hardly protrudes, even flat, and even has a depression, which is called invagination. Judging from the development of adolescent breasts, nipples are sunken. This situation is very common.

Breast anatomy

The breast bulges in the chest cells of the third and seventh ribs.

Breasts are limited to:

It's the upper cleavage.

Below is the lower cleavage.

The interior of the sternal valley.

The outer boundary is fuzzy, but it can be detected when you lie on your back (a person lying horizontally).

It can be seen that the upper and lower cleavage correspond to the first Cooper ligament and the last Cooper ligament respectively. These ligaments are bundles of connective fibers, which connect the dermis with the breast at the Duret fiber (the crest of the breast). The periphery of the breast is soft tissue, which is rich in blood vessels and communicates with the dominant basic unit of the breast. The central part is relatively strong, mainly containing excretory ducts and connective tissue. The basic units of fat and connective tissue are distributed in many ways. If the breasts are enlarged, there will be particularly fat breasts, or particularly rich breasts, or half-fat and half-breast mixed breasts. X-ray mammography is a kind of radiation diagnosis, which can obtain important information of breast structure. The skin layer is heterogeneous. The surrounding skin is thicker, but the skin at areola and nipple plate is thinner.

Areola and nipple plate

This is an inseparable unit of anatomy. Areola pigmentation (uneven deposition). The diameter is 35-50 mm, and Morgagni nodules appear due to a large number of sebaceous glands. Pigment deposition is irregular. The nipple is a cylinder or cone with many negative pressure holes. This is a hole for milk.

The state of the breast is unstable. Because it is located in the protruding part of the front porch, like a frog hiding in a cathedral!

Two different breasts

You know, there is absolutely no connection between the two breasts except lymphatic vessels. The evidence is that when cancer appears on one side, lymph nodes may appear under the armpit on the other side. Therefore, one breast is always bigger than the other. Even when it is obvious, it is common and harmless. Please rest assured, because people can perceive that after a few years, they will narrow the difference on their own, and there will be a small difference when they are pregnant. It must be noted that some irregular breasts sometimes have obvious reasons, which can be traced back to childhood.

In particular:

There is an abscess incision.

I burned my chest with thick food.

Total or partial damage of "milk bud" caused by certain behaviors. In this case. Irregularities in breast size are difficult to correct. Plastic surgery can be considered.

Breast fixation method

Breast is a structure of skin anatomy and embryology, which is independent of skin system. It has nothing to do with pectoralis major, but it hangs on pectoralis major at the same time. It must be pointed out that when a woman is pregnant, the number and diameter of mammary blood vessels increase. When it degenerates, it is always incomplete. The same is true of menstrual cycle. A few days before menstruation, the degeneration is the largest, and a few days after menstruation, the degeneration is the smallest. This is why some surgeons suggest that the fourth day after menstruation is the most suitable time for plastic surgery or X-ray. It is closely related to the movement of skin. Some contraction of cervical epithelial muscles will cause breast lift. The study of breast blood vessels proves the importance of skin phenomenon. There are two arteries, an external artery and an internal artery, which are connected with the right front part of the breast in the form of perforating arteries. The perforating artery originates from the subcutaneous arterial network of the main dermis. The blood vessels on the opposite side of the breast can not be ignored.

You know, the skin is the most basic support of the breast. In order to have and keep a pair of beautiful breasts, it is very important, don't forget. In the following content: We will talk about daily breast enhancement and family clinical care. Under the action of gravity, breasts tend to naturally sink and sag. Only the skin supports the chest. The condition of skin and its elasticity are the most basic factors of breast balance.

Areola and nipple plate are the keys to the static vault of breast.

The nipple is the geometric center of the breast pyramid.

All the connecting membranes and milk ducts are concentrated on the nipple.

Nipple is the biggest adhesion point between skin and breast.

In a word, we can be sure that the static state of breast comes from the combination of skin and breast. This combination is achieved through the following points:

The mammary duct and pectoral muscle are combined in areola and nipple plate.

Connected by the Cooper ligament around the breast.

In a person's life, there will be physiological changes in the breasts during adolescence, pregnancy, lactation and menopause.

Abnormal breast size and morphology: hypertrophy, drooping, asymmetry, congenital hypoplasia, congenital or hereditary nipple invagination (except pathological conditions).

Skin stretching in breast remodeling.

About the shape of breasts

According to the records of the Anthropology Museum, the shape of breasts can explain people's race. In the face of black girls' tall and aggressive breasts, you may have fantasies. At first, the breasts were conical, but after delivery, they were elongated to breastfeed the baby on the back. Similarly, Asian women's breasts are also small cones. Pear-shaped breasts, like pears Rich in mammary glands, the breasts of women in North Africa enjoy a high reputation. Pancake-shaped breasts, hemispherical breasts carved in Indian temples; Except for Greek sculptures, completely hemispherical breasts are rare. The most common breast is the breast of a French woman, which is almost hemispherical, with a little concave on the top and a little convex on the bottom. Nipples also have different shapes: cream ball cake, areola edema. Especially young girls' nipples are not stereoscopic, flat or degenerate into gaps (endothelium) embedded in areola. There are good and not-so-good shapes. Disc-shaped or semi-apple-shaped breasts, which grow on ribs with big cracks and some bulges, are less affected by gravity and remain beautiful for a long time until aging. On the contrary, pear-shaped breasts are very beautiful, with narrow and prominent bottoms, but they are short-lived ... As for clumsy breasts, they are bound to age rapidly. Finally, higher breasts. They are stronger.

A good posture of breasts depends on people's behavior in addition to their shape. The doctor said that the key period is adolescence. Mothers should pay attention to their young daughters and force them to remain upright. Ladies, tell your daughters that their breasts must be proud and straight. A woman's breasts will deform all her life. Breasts will never taste the same from beginning to end. Some women are less shocked by this change than others. Of course, at first, there were genetic factors. Generally speaking, a young girl's breasts are similar to those of her mother or grandmother, but there are many exceptions. Lucky woman, her breasts are tall and small. The number one enemy of this kind of breast is gravity.

Please believe that the same woman can reflect her race in different periods of her life. European women are most beautiful at the age of 20. Asian women are the most beautiful at forty, and African women are even later.