334 



DIVERSIONS OF A NATURALIST 



KM 



mm 



this smaller trunk, since 

 it is not brought to 



anatomists to trace the fine branches of the lacteals 

 uniting branch to branch, and at last forming a large 

 trunk — called the thoracic duct — about 

 a quarter of an inch thick, which runs 

 up the inner face of the backbone to the 

 neck, where it joins the great left sub- 

 clavian vein, and pours its contents into 

 the blood-stream which is there nearing 

 the heart, A small trunk formed by 

 the union of lymphatic vessels from the 

 right side of the head and neck and 

 the right upper limb 

 Fig. 43. — The opens into the right sub- ; 

 fore - arm of clavian vein. It took j 



man, with the , ,. 



skin removed ^ome time to discover , 



so as to show 

 the large sup- 

 erficial lym- . , .|| , , 



... ' , View by milky contents. 

 phatic vessels •' ^ 



resting on the Gradually it was made 

 muscles. They out that there are in- 

 numerable transparent 

 branches opening into the i 

 On the palm thoracic duct from the 

 of the hand whole of the body, be- 

 L' \ ^" °" sides the milky-looking 



the fingers a / e> 



closer network 

 of these ves- 



sels is repre- ^^ "lymph," from all the 

 sented, but . . , 



the smaller viscera, from the muscles, 



lymphatic cap- and from the deeper 



lUaries and layers of the skin in every 

 spaces are not . . . , , 



shown. region of the body, even 



from the toes, fingers, and 



tongue tip. In fact, wherever the blood-vessels take 



blood there are also vessels of the lymphatic system 



are represent- 

 ed as white 

 knotted cords. 



lacteals: branches which 

 bring " limpid" clear fluid. 



