Illustration of breast glands during pregnancy. The female breast consists mainly of 15-20 lobes of milk-secreting glands (here,coloured pink) em- bedded in fatty tissue (yellow). Ducts of these glands have their outlet at the nipple. The breast contains no muscle,but bands of fine ligaments weave between the fat and gland-lobules; they are attached to the skin and determine the breast's shape. During pregnancy,oestrogen and progeste- rone are secreted by the ovary and placenta. These hormones stimulate the milk-producing glands of the breast to develop,enlarge,and become active in preparation for breast-feeding. After birth,these glands first produce colostrum,then milk | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bavosi, John |
Bildgröße: | 3466 px × 5112 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |