. An elementary course of practical zoology. Zoology. 194 THE FROG urinogenital duct, On the outer side of the ureter, and com- municating with it by numerous short ducts, is a glandular body, the seminal vesicle (Figs. 3 and 7, vs. sm), which serves to store up the spermatic fluid. The spermary itself contains a narrow, irregular, central cavity, from which the efferent ducts proceed and into which open a number of short tubes or crypts (Fig. 62, A).. Fr Fig. 61,—Spermary and kidney of frcg showing the relations of the efferent ducts (semidiagrammatic). C. transverse tubes in kidney; Ho. sper
. An elementary course of practical zoology. Zoology. 194 THE FROG urinogenital duct, On the outer side of the ureter, and com- municating with it by numerous short ducts, is a glandular body, the seminal vesicle (Figs. 3 and 7, vs. sm), which serves to store up the spermatic fluid. The spermary itself contains a narrow, irregular, central cavity, from which the efferent ducts proceed and into which open a number of short tubes or crypts (Fig. 62, A).. Fr Fig. 61,—Spermary and kidney of frcg showing the relations of the efferent ducts (semidiagrammatic). C. transverse tubes in kidney; Ho. spermary; L. longitudinal tube ; N. kidney ; q. efferent ducts of spermary; Ur. ureter (urinogenital duct). (From Wieder- sheim's Anatomy.) These are lined with epithelium (/. e), the cells of which divide and subdivide, forming groups of smaller cells. Each of the latter undergoes a remarkable change, becoming con- verted into a rod-like body, produced into a long thread, which performs lashing movements, very much like those of the cilia in ciliated epithelium. These bodies are called sperms or spermatozoa (Fig. 62, 'A, sp, and B)'; in spite of. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Parker, William Newton, joint author. London, Macmillan and Co. , Limited; New York, The Macmillan Company
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