. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ANIMAL KINGDOM. 117 generally unsymmetrical in their development in the female. The testes are internal, and the vasa deferentia terminate in the cloaca, where there is sometimes a grooved organ of intro- mission. In the fema'e the left ovary and oviduct are developed, the right for the most part atrophiated and useless. The cavity of the cloaca in most birds, as seen in that of the great condor of the Andes (Jig. 49), receives the end of the rectum (a), which forms a wide Fig. rectal vestibule (/») : beneath this l
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ANIMAL KINGDOM. 117 generally unsymmetrical in their development in the female. The testes are internal, and the vasa deferentia terminate in the cloaca, where there is sometimes a grooved organ of intro- mission. In the fema'e the left ovary and oviduct are developed, the right for the most part atrophiated and useless. The cavity of the cloaca in most birds, as seen in that of the great condor of the Andes (Jig. 49), receives the end of the rectum (a), which forms a wide Fig. rectal vestibule (/») : beneath this lies the part analogous to the urinary bladder (c d). Lower than the urinary sac are found the two openings of the ureters (/» /*), with the pervious oviduct on the left side (/'), and the remains of the impervious oviduct (g) on the right side. The bursa Fabricii and the clitoris (when present) are placed more posteriorly in the preputial cavity. The most distinct forms of these gene- rative and urinary parts, and the nearest ap- proach to the mammalia are seen in the cloaca of the ostrich (fig. 50), where the rectum (a) opens into a wide and distinct rectal vestibule (b), which extends into a large urinary bladder (d). Beneath the urinary bladder is the ure- thro-sexual canal (e), into which the two ureters Fig. 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 Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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