Comparative Reproductive Biology by Heide Schatten, Gheorghe M. Constantinescu

By Heide Schatten, Gheorghe M. Constantinescu

While contemplating the physiological structures of the physique, the measure of species version in the reproductive approach in comparison to different platforms is amazing. moreover, it's crucial that researchers, educators, and scholars alike stay conscious of the elemental comparative alterations within the reproductive biology of family species. Written through well known scientists of their respective fields, Comparative Reproductive Biology is a entire reference at the reproductive platforms of family species. The ebook bargains either extensive and particular wisdom in components that experience complicated the sphere lately, together with advances in phone and molecular biology utilized to copy, transgenic animal creation, gender choice, synthetic insemination, embryo move, cryobiology, animal cloning and so forth. This seminal textual content contains subject matters in animal replica which are often purely chanced on as a part of different books in animal technological know-how resembling anatomy, histology, body structure, radiology, ultrasonogrophy, and others. entire reference of the reproductive structures of household species Written by means of a staff of most sensible researchers Richly illustrated all through, together with 12 pages of colour photos

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The uterine horns are from 35 cm to 45 cm long in the cow and from 12 cm to 15 cm long in the small ruminants; the horns diminish in size toward the apex. At their origin from the body of the uterus, the horns run side by side united by perimetrium (the visceral layer of the peritoneum that surrounds the uterus). Specific to the cow, at the point that they separate from each other, the horns are connected by two ligaments, the dorsal and the ventral intercornual ligaments. In small ruminants, one single intercornual ligament joins the two horns to one another.

In the cat the penis is provided with an indistinct glans penis and small cornified The Penis The penis of the dog is very different from all the other species by the following features: cornified papillae 1. It is provided with an os penis (a cartilage is found in the cat). 2. The corpus spongiosum penis is twice as thick as the corpus cavernosum penis. 3. It has a very long glans penis, with a long part and a bulb. “The phenomenon of delayed erection in the dog is due to slow engorgement of the bulbus glandis and the pars longa glandis” (for details, see “Mechanism of Erection” in Evans, 1993).

In the dog, the entrance into the ovarian bursa is so narrow that the ovary cannot be exposed unless the orifice is enlarged with scissors. The ovaries are compressed by the abdominal viscera toward the roof of the abdominal cavity, the right ovary dorsal to the pancreas and the descending duodenum, and the left ovary dorsolateral to the descending colon. The suspensory ligament is very long. In the dog, the ovaries are longer than in the cat, and flat (2 cm in the dog versus 8 mm to 9 mm in the cat), with a shallow hilus, smooth with the exception of the time of sexual cycle, when the surface is irregular (less irregular in the cat).

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