. Anatomy, descriptive and applied. Anatomy. THE MAMAfARY GLAND 1429 nipple is rendered rough by fissures (Fig. 1207), it exhibits a depression in which are the openings of the milk ducts (Fig. 1209), and its circumference is thrown into concentric ridges (Fig. 1209). The nipple is surrounded by a darker circular wrinkled area, the areola (areola, mammae) (Figs. 1207 and 1208), which contains sweat glands and on which are twelve or fifteen small rounded elevations. These ele'ations are caused by cutaneous sebaceous glands which in structure represent a transition between sebaceous and mammary

This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.

This image could have imperfections as it’s either historical or reportage.

. Anatomy, descriptive and applied. Anatomy. THE MAMAfARY GLAND 1429 nipple is rendered rough by fissures (Fig. 1207), it exhibits a depression in which are the openings of the milk ducts (Fig. 1209), and its circumference is thrown into concentric ridges (Fig. 1209). The nipple is surrounded by a darker circular wrinkled area, the areola (areola, mammae) (Figs. 1207 and 1208), which contains sweat glands and on which are twelve or fifteen small rounded elevations. These ele'ations are caused by cutaneous sebaceous glands which in structure represent a transition between sebaceous and mammary glands. They are probably rudimentary portions of the mammary gland and are known as the glands of Montgomery {glandulae areolares) (Fig. 1209). The color of the nipple and areola varies with the complexion of the individual. In brunettes it is darker than in blondes. The usual color of the nipple in a young woman is rosy pink, the areola being of a darker shade. During the early months of pregnancy the nipple and areola become dark brown in color, the areola becomes larger in circumference, and the glands of Montgomery increase in size (Fig. 1210). The nipple contains nonstriated muscle, and mechanical irritation or sexual excitement makes it stiff and erect. The skin covering the breast is clear, soft, and delicate, and sub- cutaneous veins are often visible. The skin of the nipple and areola is particularly delicate.. Lactiferous duct. Lobnh unravelled 1 mpulla. [ ni nil m tounectwe iiasne. Fig. 1207.—Dissection of the lower half of the female breast during the period of lactation. (From Luschka.) Variations in the Mammae.—Before puberty the glands are small, are of the infantile type, grow slowly, and differ but slightly from the male organs. The nipple is small, flat, and pale. At puberty the increase in the size of the breast is rapid and considerable, due to growth of gland tissue and of subcutaneous fat. In the young virgin the breasts are of hemispherical form and