Man's Threefold Nature and Relationship to Remedies

Let us assume that you are making comparative investigations into the structural changes of the whole intestinal system, let us say from the fishes, through the Amphibia to the reptiles—the conditions in the Amphibia and reptiles in this respect, are most interesting—to the birds on the one side, and the mammals, and finally, man, on the other. You will find that remarkable changes of form occur in the organs. For instance, there are the Caeca the equivalent of what has become the vermiform appendix in man; in the lower mammals, or, in bird groups which deviate from the normal type—the rudiments of the vermiform appendix appear. Or study the quite different way in which the great gut, which does not exist in fishes, evolves through the ascent of so-called more perfect classes, into what we can recognise as the larger intestine (colon). Between this and the manner in which caeca become what we recognise as the appendix in mankind, (certain species of animals have several appendices) you will find a remarkable complementary relationship.