. Diseases of cattle, sheep, goats and swine. Veterinary medicine. 566 DISEASES OF THE MAMMARY GLANDS. VlCa sinus, is extremely rich in elastic filn-es, enabling the organ to inidergo great changes in volume without injury. Vessels.—The mammae are supplied by two great arteries, the mammary arteries, which are given off from the prepubic arteries, pass into the inguinal canal, and penetrate the gland hy its upper, deep face. Each principal lateral artery divides into two trunks, one for the anterior, the other for the posterior quarter. The veins which collect the blood from the mammae
. Diseases of cattle, sheep, goats and swine. Veterinary medicine. 566 DISEASES OF THE MAMMARY GLANDS. VlCa sinus, is extremely rich in elastic filn-es, enabling the organ to inidergo great changes in volume without injury. Vessels.—The mammae are supplied by two great arteries, the mammary arteries, which are given off from the prepubic arteries, pass into the inguinal canal, and penetrate the gland hy its upper, deep face. Each principal lateral artery divides into two trunks, one for the anterior, the other for the posterior quarter. The veins which collect the blood from the mammae form two systems, the first accompanying the mammary arteries, the second, more superficial, J-g giving rise to the anterior sub- abdominal mam- mary veins. The arterio-venous plexus of the udder, which re- presents the vas- cular pedicle of the organ, penetrates the gland, near a line dividing the posterior and middle thirds of the upper surface, an inch or so in front of the mam- mary lymphatic gland. Lymphatics.— On either side of the middle line lies an extremely rich lymphatic plexus, the origin of which is to be found near the ends of the teats and in the peri-acinous spaces. The superficial collecting vessels are dispersed under the skin, perforate the fibrous sheath towards the base of the teat, and anastomose with one another on the surface of the gland, the anastomosis being most intimate between those of the same quarter, finally emptying separately by two large trunks into the retro-mammary lymphatic gland of the same side. The vessels of the anterior quarter enter the l^anphatic gland at its most anterior point; those Of the posterior quarter join it a little Fig. 237.—Schema showing the structure and organisation of the udder. Antero-posterior section showing the arrange- ment of the anterior and posterior quarters and the teats, skin, transverse partition, etc. GEM, Eetro-mammary lymph gland; Ljj. lymphatics of the posterior quarter; La, lymphatics
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
