. Il encyclopaedia - Wikizionario di anatomia e fisiologia. Anatomia e fisiologia; Zoologia. 11EPTILIA. 317 le arterie di reni penetrare questi organi mediante il loro margine interno, mentre i tronchi di vene emulgent occupano il bordo opposto. Questi ultimi sono in numero di due, Fig. 233.. Generativa ed apparato urinario del Rattlesnake (Crotahis Durissus). UN, gli intestini tagliare appena sotto il piloro; b, la cistifellea: c, il dotto biliare, che passa attraverso il centro della milza,- o, come chiamato da camme, il pancreas,- e si inserisce nel grande intestino; d, la milza o il pancreas; e, gli intestini, whi

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. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 11EPTILIA. 317 arteries of the kidneys penetrate these organs by their inner margin, whilst the trunks of the emulgent veins occupy the opposite border. These latter are two in number, one Fig. 233.. Generative and Urinary Apparatus of the Rattlesnake (Crotahis Durissus). a, the intestines cut off just below the pylorus; b, the gall-bladder: c, the biliary duct, that passes through the middle of the spleen, — or, as called by Cams, the pancreas, — and enters the large gut; d, the spleen, or pancreas; e, the intestines, which were very lai'ge and winding, but short; ff, the rectum ; h fi, the testes ; i i i, the vasa deferentia ; k k, the penis on each side, which first at the root are conjoined, and are thick beset with bristles; /, the muscles that serve for drawing in the penis; m, the scent-bags ; t tt, secretory vessels. of which unites with its fellow from the op- posite kidney to form the commencement of the posterior cava. The other communicates with the veins returning the blood from the posterior extremities and the tail; it is this latter vessel which Mr. Jacobson regards as forming the portal vein of the kidneys.* The ureters are longer or shorter in pro- portion as the kidneys are more or less ad- vanced forwards ; they terminate in the cavity of the cloaca, their openings being in the * Vide the article Ri.x. vicinity of the allantoid sac, if that viscus is present. The allantoid sac, generally called by authors the urinary bladder, in no case immediately receives the terminations of the ureters, and its presence is by no means constant. In the Chelonian order it is very large, and is divided at its fundus into two portions ; but its walls are very thin and membranous. It is likewise met with in the following genera of Saurians ; namely, the Iguana, the Tupinambis, Chameleon, Draco, and Stellio; while it is wanting in the Crocodiles, Lizards, Agame, Gecko, and other genera of t

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