Breast Anatomy

Breast anatomy - a female breast or mammary gland is comprised primarily of connective tissue, fatty tissue, lobules or glands and milk ducts. The normal female breast weighs between 50 - 500 grams. The shape and contour of the breast is mostly influenced by the woman's body type. Each breast consists of 15 to 20 sections, called lobes. Each lobe consists of smaller lobules that make up even smaller bulbs referred to as a terminal ductal lobular unit. This network of lobes, lobules and bulbs are all interconnected and end at the nipple. Surrounding the nipple is the slightly raised pigmented skin known as the areola. Both the nipple and the surrounding areola contain smooth muscle fibers that are responsible for the erect nipple. The areola also contains Montgomery's glands (often appear as small raised bumps) which lubricate the region.

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The breast is drained by lymph nodes to multiple areas that include the skin surrounding the breast, the chest wall, and the axilla (armpit). The majority of the lymphatic drainage is via the axilla region. This is why general surgeons use the lymph nodes in the axillary region to assess the spread of breast cancer when considering the appropriate therapy.

Menstrual cycle, pregnancy, breast feeding, weight gain/loss, birth control, and changes in hormones can all contribute to temporary changes in the shape and contour of the breast tissue. Since the breast have no actual supportive muscular tissue within the breast there are no "exercises" that can firm or tone the breast. Younger women may be able to produce a slight lifting affect of the breast by toning the underlying pectoral muscles.

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