190 



MANUAL OF PHYSIOLOGY. 



tremity. (Fig. 80.) On the right side a smaller trunk convey- 

 ing the lymph from the right arm and that side of the head, 

 chest, and neck, opens into the corresponding venous trunks. 



The thoracic duct is much larger than any of the numerous 

 tributaries which enter it at close intervals from all directions. 



FIG. 83. 



Diagram of a Lymphatic Gland, showing (a I) afferent and (e I) efferent 

 lymphatic vessels; (c) Cortical substance; (M) Medullary substance; (c) 

 Fibrous coat sending trabeculw (tr) into the substance of the gland, where 

 they branch, and in the medullary part form a reticulum, the trabeculse are 

 surrounded by the lymph path or sinus, which separates them from the 

 adenoid tissue (/ A). (Sharpey.) 



Its lower extremity or point of origin is an irregular dilata- 

 tion called the receptaculwn chyli, because the lymphatic vessels 

 from the stomach and intestines, or lacteals as they are called, 

 pour their contents into it. The chyle from the intestines thus 

 flows into the same channel as the lymph which is derived from 

 the drainage of the tissues and organs of the lower extremity, 



