2163. The biliary intestine does not stand upon a par with the other intestines, but has an equal rank with the stomach. It is therefore not confined within the mesentery, but can expand itself like the stomach; it has its vessels and nerves. In it the separation of the chyme into chyle and excrementitious matter takes place. 2164. What the spleen is for the stomach, that is the liver for the duodenum; it is the hepatic stomach, and consequently the vascular stomach. 2165. The liver is the ramification of the intestinal canal along with the whole vascular system. 2166. Now, as the analysis is the principal function in the whole process of digestion; so is the liver the chief organ of all digestive organs. 2167. The liver is the centre, the brain of the digestive system, because it is the blossom, the synthesis of the vascular system. From it everything emanates, and upon it everything which concerns digestion, ay, the whole body, retrogressively operates. If the liver suffers or undergoes functional derangement, the whole vascular and tegumentary formation then becomes a liver, as is exemplified in the disease called jaundice. 2168. The bile effects the analysis or separation through its basic or alkaline character, since it combines with the acids of the chyme, and thereby forms the excrementitious matter. 2169. That which mediates between the acid and what is alkaline is the fluid secreted by the pancreatic gland. The pancreatic gland is the ramification of the intestine along with the arterial system. _Tegumental Intestine._ 2170. That in the jejunum and ileum or the small intestine proper, and in that alone, absorption and thus the tegumentary function, but nothing else, occurs, is well known. By this absorption the chyle becomes removed from the intestine, so that the excrement alone is left. b. _Sexual Intestine._ 2171. The sexual is pre-eminently that which is exsecernent or excretive, since one sex strives to redintegrate itself upon the other, becomes ingestive for the other, but egestive for or in relation to itself. It is therefore an essential property of the sexual parts, that they secrete and excrete. 2172. Every galvanic system, which has been adjoined or appended to the sexual parts, is excretive. They are, taken in a rigid sense, the only system of excretion. The co-operative processes of the sex are those of the vegetative systems, but they take place in the reverse direction. The latter convey inwards, the former outwards. The kidneys are a reversed or evacuating lung, an excrement-forming liver; the urinary cyst is an exspirant, a trachea containing refuse matter; the urethra is a glottis reversed; their diseases are therefore similar. They thus expel products of the individual respiratory system.