. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. 460 COMPARATIVE ANATOMY region : it has the latter position, for instance, in most Reptiles (Figs. 345, 357, 358) and all Birds (Fig. 346). The posterior end of the kidney, which is generally narrower than the rest, may even extend under the root of the tail, as in Lacerta, in which region the two organs are fused. Thus according to the position of the kidneys, the ureters (inctanephric ducts) either do not extend freely along the. Fi<;. 346.—MALE UHINOGKNITAL APPARATUS OF HEKON ( Ao, aorta; BF, bursa Fabricii,
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. 460 COMPARATIVE ANATOMY region : it has the latter position, for instance, in most Reptiles (Figs. 345, 357, 358) and all Birds (Fig. 346). The posterior end of the kidney, which is generally narrower than the rest, may even extend under the root of the tail, as in Lacerta, in which region the two organs are fused. Thus according to the position of the kidneys, the ureters (inctanephric ducts) either do not extend freely along the. Fi<;. 346.—MALE UHINOGKNITAL APPARATUS OF HEKON ( Ao, aorta; BF, bursa Fabricii, which opens into the cloaca at BF1 ; Ep, epi- didymis; Ho, testis ; N, kidney; Ur, ureter, opening into the cloaca (<_'<•) at Sr ; V, V, furrows on the ventral surface of the kidney in which veins lie embedded ; Vd, vas deferens, which opens at Vdl on a papilla in the cloaca. body-cavity, or they may have a longer or shorter free course. The latter is the case, for instance, in Crocodiles, and more especially in Birds (Fig. 346): in the latter the kidneys are closely embedded within the pelvis, and their ventral flattened surface is usually divided into lobes and is often. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, Macmillan and co. , limited
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