Breast

Each breast has six to nine overlapping sections, called lobes. Within each lobe are many smaller lobules, which end in dozens of tiny bulbs that can produce milk. The lobes, lobules and bulbs are all linked by thin tubes called ducts. These ducts lead to the nipple in the center of a dark area of skin called the areola. Fat fills the spaces around the lobules and ducts. There are no muscles in the breast, but muscles lie under each breast and cover the ribs. Each breast also contains blood vessels and vessels that carry colorless fluid called lymph. The lymph vessels lead to small bean-shaped structures called lymph nodes. Clusters of lymph nodes are found in the axilla under the arm , above the collarbone and in the chest. Lymph nodes are also found in many other parts of the body. The material in the above section is taken in its entirety from the National Cancer Institute Booklet No. UCSF Health medical specialists have reviewed this information. It is for educational purposes only and is not intended to replace the advice of your doctor or other health care provider.

This diagram of the breast shows the location of the lobules, lobe, duct, areola, nipple, and fat. A breast is made up of three main parts: lobules, ducts, and connective tissue. The lobules are the glands that produce milk. The ducts are tubes that carry milk to the nipple. The connective tissue which consists of fibrous and fatty tissue surrounds and holds everything together.

Breast. Basic Facts About Breast Health: Breast Anatomy | UCSF Health

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These changes include higher estrogen and progesterone levels in the body.

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The breasts are divided by an invisible line running up and down and right to left through the nipple. Each of these 4 regions is called a quadrant. Most breast cancers develop in the upper outer quadrant of the breast, closest to the armpit. This is because this area has a lot of glandular tissue. Each breast lies over a large muscle called the pectoralis major muscle on the chest. The breast covers a fairly large area. It goes from just below the collarbone called the clavicle to the armpit called the axilla and across to the breastbone called the sternum. Breasts start to grow during puberty, which usually takes place between 10 and 12 years of age. At this time, the breasts respond to hormonal changes in the body. These changes include higher estrogen and progesterone levels in the body. The breasts start to build up fat and the ducts begin to grow and branch. The glands of the breast also start to develop during puberty. The breast skin stretches as the breasts grow, creating a rounded appearance. Young women tend to have denser breasts with more gland tissue than older women. As a woman ages, much of the gland and duct tissues are replaced with fat. This makes the breasts less dense. Ligaments also lose their elasticity as a woman ages, which causes the breasts to change shape and lose some of their fullness. The size depends on the amount of fat in the breast.

Breast disease, Breast. Gallen Oncology Conference in St. Archived from the original on 19 April Journal of Mammary Gland Biology and Neoplasia. American Caner Society. Executive Health Program. Both females and males develop breasts from the same embryological tissues. In women with non-metastatic breast cancer, psychological interventions such as cognitive behavioral therapy can have positive effects on outcomes such as anxiety, depression Breast mood disturbance, and can also improve the quality of life, Breast.

Medical disclaimer

See also: Carcinogenesis. These glands secrete oily Breast that lubricate and protect Breast nipple during breastfeeding. Treatment is generally the same as for non-pregnant women. Mastectomy is the standard surgical treatment for multi centric breast cancer patients. Archived from the original on 16 April Retrieved 13 February Internal Medicine Journal, Breast. Artificial Organs 8Breast, pp. Preventive medicines. Word Lists. Despite this, Breast, Black women at every age are more likely to succumb to breast cancer. In Hispanic women, the incidence of breast cancer is lower than in non-Hispanic women but is often diagnosed at a later stage than white women with larger tumors.

American Journal of Physical Anthropology, Breast. Rutgers University Press. Archived from the original on 6 April Breast In general, hormone replacement therapy HRT to treat menopause is associated with only a small increased risk of breast cancer, Breast. During the menstrual cycle, the breasts are enlarged by premenstrual water retention and temporary growth.

Learn how to prepare for a lumpectomy or mastectomy, including restrictions before surgery, Breast, what to bring to the hospital and more, Breast. Explicaciones claras Breast uso natural del Breast escrito y oral. Chapter Archived from the original on 31 March Retrieved 9 May Outline of human sexuality. Molecular Cell. Ethology and Sociobiology. The lymphatic drainage of the breasts is especially relevant to oncology because breast cancer Breast common to the mammary gland, and Breast cells can metastasize break away from a tumour and be dispersed to other parts of the body by Breast of the lymphatic system. The primary function of the breasts, as mammary glands, is the nourishing of an infant with breast milk, Breast. Clinically, the most useful metabolic markers in breast cancer are the Breast and progesterone receptors that are used to predict response to hormone therapy. In the first part of the menstrual cycle, Breast, estrogen stimulates the milk ducts to make them grow. Even when breast cancer can't be cured, many treatments exist to extend Breast. Journal of Breast Cancer. Free word lists and quizzes from Cambridge.