. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. WITHIN MALE REPRODUCTIVE STRUCTURES 183 (4) the possibility of a weak sperm motility aiding the advance of the sperm through the body of the epididymis must not be denied; (5) the vigorous pumping action of the vas deferens, especially during the stimulation attending ejaculation, serves to transport the sperm from the "epididymal well" (the cauda epididymidis) through the vas deferens to the external areas. 2. Transportation of Sperm in
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. WITHIN MALE REPRODUCTIVE STRUCTURES 183 (4) the possibility of a weak sperm motility aiding the advance of the sperm through the body of the epididymis must not be denied; (5) the vigorous pumping action of the vas deferens, especially during the stimulation attending ejaculation, serves to transport the sperm from the "epididymal well" (the cauda epididymidis) through the vas deferens to the external areas. 2. Transportation of Sperm in Other Vertebrates with a Convoluted Reproductive Duct The transportation of sperm in other vertebrates which possess an extended and complicated reproductive duct similar to that of the mammal presumably involves the same general principles observed above (fig. 105A, B). However, certain variations of sperm passage exist which are correlated with structural modifications of the accessory reproductive organs. For example, the repro- ductive duct may be somewhat more tortuous and complicated in some in- stances, such as in the pigeon, turkey, and domestic cock (figs. 102, 105B). That is, the entire deferent duct extending from the epididymis caudally to the cloaca may be regarded as a sperm-storage organ, as sperm may be col- lected in large numbers all along the reproductive duct. As the cock is capable of effecting repeated ejaculations over an extended period of time,. LUMEN GLAND-LIKE OUT POUCHING S OF MAIN LUMEN FOLDS OF MUCOSA Fig. 101. Portion of a cross section of the ampullary region of the ductus deferens in man. Observe gland-like outpouchings of the main lumen and character of mucosal folds. Surrounding the lumen may be seen the highly muscularized walls of the ampullary 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
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