. The biology of the frog. Frogs. REPRODUCTIVE ORGANS AND FAT BODIES 219 eggs reach their full development they break through the follicle and the outer wall of the ovary, and are discharged into the body cavity. When the eggs are all extruded,the ova- ries, which before had filled the greater part of the body cav- ity, become reduced to small wrinkled or- gans, containing the minute ova for the following year. The oviducts are a pair of convoluted tubes extending the length of the body cavity on either side of the middle line. They are surrounded by peritoneum which is continued dorsally to f
. The biology of the frog. Frogs. REPRODUCTIVE ORGANS AND FAT BODIES 219 eggs reach their full development they break through the follicle and the outer wall of the ovary, and are discharged into the body cavity. When the eggs are all extruded,the ova- ries, which before had filled the greater part of the body cav- ity, become reduced to small wrinkled or- gans, containing the minute ova for the following year. The oviducts are a pair of convoluted tubes extending the length of the body cavity on either side of the middle line. They are surrounded by peritoneum which is continued dorsally to form a supporting membrane which ex- tends to the dorsal body wall outside of the mesovaria. An- teriorly, each ovi- duct opens by a wide mouth, or ostium, into the body cavity near the base of the lung. At the posterior end it en- larges to form the thin-walled, very distensible uterus; the openings of the two uteri lie close together on the. Fig. 70.—Urinogenital organs of a female frog. N. kidneys; Od, oviduct; Ot, its opening into the coelom ; Ov, ovary; P, opening of the oviduct into the cloaca : S, S', openings of the ureters; Ut, uter- ine dilatation of the oviduct. (After Wiedersheim.). 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 Holmes, Samuel J. (Samuel Jackson), 1868-. New York : The Macmillan company
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