Dear Aline: Look in any standard veterinary anatomy textbook to get what is known. You might start with Sisson and Grossmann's "Anatomy of the Domestic Animals" (modern editions are edited by Getty and may be listed with Getty as author).
Kainer and McCracken (or some editions are McCracken and Kainer) "The Coloring Atlas of Equine Anatomy" has some nice plates, which are fun because they're set up so you can color them and thus learn the routes that the vessels take.
In general, the lymph system is hard to demonstrate in gross dissection, because lymph vessels have very thin walls which either collapse and become practically invisible when the animal dies, or which burst open when attempts are made to inject them with latex as is normally done with the arterio-venous system. Thus, books such as the "Photographic Atlas of Equine Anatomy" have less information, simply because it's hard to take photographs of lymph vessels. Generally, however, lymph NODES aren't too difficult and you can find good images of those in the "Photographic Atlas" as well as in Sisson and Grossmann.
What are they telling you in the massage therapy course you're taking about the function and significance of the lymph system?
thank you so much for your attention;Well , the lymphsystem is one of the most benefited through massage aplication, it carries away all the residual toxines moved by the massage strokes, waht happened to me is that since I've been doing humans for a long time , i've seem so many books on that , lymphatic drainage therapy, etc...........so I picked this theme for my presentation and guess what, didn't find much, but with your great help I'll get there, let's keep'touch!