The anatomical record . ion is unncessary. The rel-atively large renal corpuscle, of spherical form, joins the proxi-mal convoluted portion bv means of a short neck. The proximalconvoluted portion is arranged in the form of a long loop, withnumerous secondary loops, extending toward the periphery ofthe cortex and retinning to the vicinity of the renal corpuscle andfor a distance into the medulla. The length of this tubularsegment, from renal corpuscle to the region of the small cross,is approximately mm. The medullary loop (loop of Ilenle)extends for a distance into the medulla. In the tea
The anatomical record . ion is unncessary. The rel-atively large renal corpuscle, of spherical form, joins the proxi-mal convoluted portion bv means of a short neck. The proximalconvoluted portion is arranged in the form of a long loop, withnumerous secondary loops, extending toward the periphery ofthe cortex and retinning to the vicinity of the renal corpuscle andfor a distance into the medulla. The length of this tubularsegment, from renal corpuscle to the region of the small cross,is approximately mm. The medullary loop (loop of Ilenle)extends for a distance into the medulla. In the teased prepara-tion it was not jiossible to determine dehnitely the characterof its epithelium, though the proximal arm appears stainedslightly lighter than the distal arm as though lined by a thinnerepithelium. The distal arm returns towartl the cortex andcomes in close relation with the renal corpuscle of the tubule,this relation is not shown in the mounted preparation but , TUBULES OK VERTEBRATES :i33 Fig. 19 Renal tubule of bird, Gallus domestica, isolated by teasing from thecentral jwrtinn of a renal lobule. X 40. This tubule is of the mammalian typeof avian renal tubules, re, renal corpuscle; , proximal convoluted .seg-ment; , niedullnry loop; , distal convoluted segment: , con-necting or junctional tubule; , collecting duct. 334 G. CARI. IIIBKR ascertained before the lul)ul( was completely teased. Thelength of the medullary loop with the ascending liml> to hegin-iiiiifl of distal convoluted jiortion (coil complex, up!)er rip;ht ofli^ure) is 3.(5 nun. The distal convoluted portion, upper rightof figure, presents two more prominent loops each with severalsecondary loops. Before teasing, this portion was compactlyarranged and has a length of mm. It is followed l\v a longconnecting or junctional tubular segment leading to the col-lecting duct, and adding nmi. to the length of the tube. Asmay be seen from the figur
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
