2240. Lastly, the salivary glands also in the mouth as well as in the duodenum, the abdomino-salivary glands, and even the odoriferous glands on the rectum, such as the castor-and civet-pouches, are complications of vessels with intestinal ramifications.
C. VASCULAR ORGANS OF THE SEX.
Kidneys.
2241. The vascular organ of the sexual system is the kidneys.
2242. As the urine is chiefly characterized by the urea and thus by a basic principle; it thus corresponds to the bile, and consequently the kidneys directly to the liver or the lung reversed.
2243. But there is also a sexual branchia in those inferior animals which breathe through the anus, such as many aquatic larvæ.
2244. The remnant of this in the higher animals appears to be the allantois, and in the body itself probably what have been called the primordial kidneys.
2245. The combination of the vascular system with the animal systems is the sense of touch.
3. RESPIRATORY ORGANS.
2246. The respiratory organ is a development of the integument.