. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE LYMPHATICS. 717 the surface of the superficial aponeuroses, in forming parallel fasciculi, like the deep lymphatics. The direction followed by the lymphatics m their course, is nearly always somewhat rectilinear ; they never show the flexuosities which are so marked in the course of certain arteries, and even some veins. Neither do they com^ municate with one another by transverse or arching anastomoses, Uke those so commonly met with in the other two orders of vessels belonging to the circulatory apparatus. They fr
. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE LYMPHATICS. 717 the surface of the superficial aponeuroses, in forming parallel fasciculi, like the deep lymphatics. The direction followed by the lymphatics m their course, is nearly always somewhat rectilinear ; they never show the flexuosities which are so marked in the course of certain arteries, and even some veins. Neither do they com^ municate with one another by transverse or arching anastomoses, Uke those so commonly met with in the other two orders of vessels belonging to the circulatory apparatus. They frequently, however, in their parallel course, bifurcate and join the neighbouring vessels. (At certain situations—as at some of the articula- tions, and in other parts—the larger trunks suddenly break up into a close interlacing plexus of small vessels or capillaries—Fig. 392—which in their arrangement greatly resemble the refe mirahiU of the blood-vessels. This plexus F>K. A SECTION OF A SIMPLE LYMPHATIC RETE MIRABILE, VIEWED FROM THE SURFACE. a, a, Afferent vessels; h, b, efferent vessels only partially visible (from the popliteal space). is surrounded by condensed connective tissue, and is penetrated by blood-vessels, though no communication takes place between them and these, the only points at which communication occurs being where the great lymphatic trunks empty themselves into the vena cava. This refe would appear to be the first step towards the formation of a lymphatic gland.) But of all the considerations relative to the course of these vessels, the most interesting are those which belong to the glandiform bodies placed along their track, the abridged history of which we shall give immediately. Termination.—We have already mentioned the thoracic duct and the right great lymphatic vessel as being the receptacles of all the absorbent vessels of the body, and we have also stated that these two trunks enter the general venous system ; this union of the
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