504 



THE DIGESTIVE APPARATUS J.V MAMMALIA. 



already known as proceeding 

 to the splenic fissure, whence 

 serous covering. 



Steucture. — The tissue 

 approaching to a red hue ; it 

 of the finger, and retains its 

 its substance includes a Jib: 

 vessels, and nerves. 



Serous membrane. — This 

 in the fissure of the anterior 



to the colon, and in its passage becoming attached 

 it extends over the surface of the organ to form its 



of the spleen has a violet-blue colour, sometimes 



is elastic, tenacious, and soft, yields to the pressure 



imprint. Enveloped externally by the peritoneumr^ 



rous frameivork, splenic pulp, Malpighian corpuscleSy 



is spread over the whole surface of the organ, except 

 border. Its internal face adheres most intimately 



STRUCTURE OF THE SPLEEN (DIAGRAMMATIC). 



A, Artery; V, vein. 1, Splenic trabeculse; 2, finer trabeculse; 3, reticulum of the splenic pulp; 

 4, lymphoid infiltration into the sheath of the arteries ; 5, its continuation with a Malpighian 

 corpuscle; 6, membrana propria; 7, sheath of the vein; 8, recticulum of the splenic pulp; 9, 

 termination of the fibrillar sheath of the capillaries; 10, tuft of arteries; 11, arterial capillaries; 

 12, their opening into the intermediate tracts of the pulp; 13, veins; 14, venous capillaries; 15, 

 part of the pulp containing the remains of cells; 16, Malpighian corpuscle attached to (17) an 

 artery, seen in a section perpendicular to the axis of the vessel. 



to the proper tunic of the spleen. It is only an expansion of the serous bands 

 which limit the movements of the viscus. 



Fibrous frameworJc. — Under the peritoneal membrane is a thick, resisting, 

 fibrous tunic, roughened and granular on its exterior, and sending from its deep 

 face into the interior of the mass a multitude of prolongations called trabeculce, 

 which cross in all directions, forming a cellular network, in the numerous naiTOW 

 meshes of which are the other elements of the organ. In washing out a morsel 

 of spleen in a jet of water, the latter are removed, and the outlines of this 

 fibrous structure are fully exposed. If a stream of water be passed through the 



