Florence 11. Sabin 



3?7 



fceep the diagram at the same magnification as the others. An outline 

 of the entire section is shown in the margin. It gives the artery and a 

 few eiferent ducts at the hihim and also a large trabecula (t), carrying 

 alferent ducts. This trabecula connects with the cortex in another 

 section of the sx^ries. The left hand part of the section shows a consid- 







CCS 



Fig. 14. Diagram of the primary lymph node in an embryo pig, 23 cm. 

 long. X about 33. The diagram was made from a segment of a section, the 

 outline of the entire section being given in the margin. A. artery; c. capsule; 

 cs, central sinus; dts. developing trabeculag of the sinuses; ed. efferent duct; 

 gc, germ center; /c, lymph cord; 7p, lymph plexus; ps. peripheral sinus; t, 

 trabecula with afferent ducts. 



erable advance over the preceding stage; it represents practically adult 

 conditions where the entire node has been transformed into lymph cords 

 and sinuses. This change has come aljout in the following manner: 

 The lymph duct plexus or sinus, which was only on the edge of the 

 preceding section, making the peripheral sinus, has now grown into the 

 29 



