Elementary anatomy and physiology : for colleges, academies, and other schools . elementaryanato00hitc Year: 1869 A ^ D PHYSIOLOGY. 2S5 Fig. 2*7. size, of a knotted appearance, and very frequently dividing into two nearly equal branches. Like veins and arteries, they have three coats, with folds of the inner coat for the formation of valves, giving them a knot- ted appearance. They com- mence in a minute net-work in nearly every organ of the body, and soon unite into a few large trunks which take a direction towards the veins in the lower part of the neck. This net-work is so exceed- ingly de
Elementary anatomy and physiology : for colleges, academies, and other schools . elementaryanato00hitc Year: 1869 A ^ D PHYSIOLOGY. 2S5 Fig. 2*7. size, of a knotted appearance, and very frequently dividing into two nearly equal branches. Like veins and arteries, they have three coats, with folds of the inner coat for the formation of valves, giving them a knot- ted appearance. They com- mence in a minute net-work in nearly every organ of the body, and soon unite into a few large trunks which take a direction towards the veins in the lower part of the neck. This net-work is so exceed- ingly delicate, that when filled with mercury it presents the appearance of a sheet of silver. The necessity of such an im- mense number of these vessels arises from the constant lib- eration of the waste particles of matter which need to be removed as soon as possible, that the deposition of new particles may not be prevented. 501. Lymphatic Glands.— As the minute lymphatics unite into larger trunks, they A Yiew of the Eight Lymphatic The racic Duct. 1, Arch of the Aorta. 2, Thoracic Aorta. 3, Abdominal Aorta. 4, Arteria Innominata. 5, Left Carotid. 6, Left Sub-Clavian. 7, Superior Cava. 8, The two Verne Innominate. 9, The Internal Jugular and Sub-Clavian Vein at each side. 10, The Vena Azygos. 11, The Termination of the Vena Hemi-Azygos in the Vena Azygos. 12, The Receptaculum Chyli : several Lymphatic Trunks are seen opening into it. 13, The Thoracic Duct dividing, opposite the Middle Dorsal Vertebra, into two branches, which soon re-unite ; the course of the Duct behind the Arch of the Aorta and Left Sub-Clavian Artery is shown by a dotted Line. 14. The Duct making its turn at the Root of the Neck and receiving several Lym- phatic Trunks previous to terminating in the Posterior Angle of the Junction of the In- ternal Jugular and Sub-Clavian Veins. 15, The Termination of the Trunk of the Lym- phatics of the Upper Extremity. 500. Describe the lymphatics. How many coats have they ?
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