Female Breast Muscle Anatomy

For one breasts are not made of muscle but tissue glands and ducts. The amount of fat.

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The nipple anatomy is adjusted to support the function of the breast.

Female breast muscle anatomy. The structure of the female breast is complex including fat glandular and connective tissue as well as lobes lobules ducts lymph nodes blood vessels and ligaments. A sagittal cut away view shows the structures that comprise the breast including the pectoralis major muscle fat lobes and ducts. At the centre of the breast is the nipple composed mostly of smooth muscle fibres.

In women the breasts overlie the pectoralis major muscles and usually extend from the level of the second rib to the level of the sixth rib in the front of the human rib cage. When fully developed the female adult breast is composed of 1520 lobes of branching glands. This large fan shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region on both sides of the chest.

Thus the breasts cover much of the chest area and the chest walls. The breast runs from the second rib at the top superiorly to the sixth rib at the bottom inferiorly although larger breasts and the lactating breast may extend further down. They are surrounded by a pigmented circular region of skin called the areola which becomes even more pigmented and prominent during puberty.

There are numerous sebaceous glands within the areolae these enlarge during pregnancy secreting an oily substance that acts as a protective lubricant for the nipple. The neatly arranged petals in the illustration are lobules glands that produce milk. The major muscle in the chest is the pectoralis major.

Structures of the female breast seen on a sagittal section and anterolateral view. These lobules connect to the nipple via ducts so that milk can pass through. In most cases a breast is usually slightly larger or smaller higher or lower or of different shape to the other side.

The anatomy of the breast is depicted. The base or bed of the breast is formed by the fascia that covers the pectoralis major and minor muscles about tow thirds and the fascia of the serratus anterior muscle about one third. The breast is the tissue overlying the chest pectoral muscles.

Surrounding the nipple is a pigmented area of skin termed the areolae. Womens breasts are made of specialized tissue that produces milk glandular tissue as well as fatty tissue. Female breasts are rarely symmetrical.

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