LYMPH GLANDS. 



137 



lary cords, giving off fine branches to form capillary plexuses 

 around their peripheries (Fig. 97, F). These capillaries unite 

 to form small veins (G), which empty into larger veins. 

 The arteries supplying the follicles of the cortex (H) break 

 up into many branches, which run from the centres of the 



FIG. 97. 





Composite section of three follicles and the medullary cords <>f the meseiiteric lymphatic 

 gland of a dog. X 50. (Calvert.) A. artery ; B, medullary artery; C, follicular vein; 

 E, artery going to the capsule; F, capillaries on the periphery of a cord; G, medullary 

 vein ; H, follicular artery ; I, arterial capillaries in a follicle ; J, vein from capsule ; 

 K, cord ; L, trabecula; V, vein. 



follicles to the periphery, where they form capillary networks. 

 These capillaries unite to form the venae folliculi (C), which 

 give origin to the larger veins of the gland returning to the 

 hilus. 



It is seen that in this system there is a blood vascular unit 



