. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. KIDNEYS OF REPTILES. 539 357 are lodged. In most Serpents they are unsyrametrically situated ; the left in Coluber natrix, , being one-fourth of its length nearer the cloaca than the right kidney; and they are loosely attached to the dorsal abdominal walls. Each renal lobe is so distinct that it may be regarded as a separate kidney or renule : it is reniform in PijtJion and Boa, and is principally composed of the ramifications of the renal artery, the reni20ortal and renal veins, and the urini- ferous tubules with th
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. KIDNEYS OF REPTILES. 539 357 are lodged. In most Serpents they are unsyrametrically situated ; the left in Coluber natrix, , being one-fourth of its length nearer the cloaca than the right kidney; and they are loosely attached to the dorsal abdominal walls. Each renal lobe is so distinct that it may be regarded as a separate kidney or renule : it is reniform in PijtJion and Boa, and is principally composed of the ramifications of the renal artery, the reni20ortal and renal veins, and the urini- ferous tubules with their initial (Malpi- ghian) capsules. -The artery of the renule, entering at the notch or ' hilum,' repre- senting the pelvis, distributes its branches fanwise through the middle of the sub- stance : each branch, fig. 358, a, sends twigs to the Malpighian capsule which form within it the dilated plexus, ana- logous to that in fig-. 356, whence the l)lood is returned by the efferent vessel, in the direction of the arrow, to the branch of the reniportal vein, fig. 358, p, V: these branches being distributed fan-wise over both surfaces of the flat- tened renule. In this course they com- municate with, or help to form, a rich venous plexus, ib. p, surrounding the tubuli uriniferi, ib. t, and commrmicating with the branch of the renal or emulgent vein, ib. e, v, which accompanies the artery, in the mid-substance of the renule. The tubuli, lb. t, continued, as in fig. 356, from the capsule of the 'Malpighian body,' after some convolutions, pass to the surface next which the ' body' is placed, and terminate in a branch of the ureter, ur, there situated: these superficial branches are dispersed fan-wise, converg- ing to the ' hihuTQ,' and are often seen injected, as it were, by the opake white pultaceous urinary excretion. The Malpighian bodies diminish in size and the tubuli in length, towards the thin edge of the renule. Thus, on each superficies of the flattened renule are the radiat
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
