. The diseases of the genital organs of domestic animals. Horses; Genital Diseases, Male -- veterinary; Genital Diseases, Female -- veterinary. Ovulation 49 3. Ovulation At about the close of estrum, in those animals where the phenomena have been studied, as in the cow, the distended ovisac ruptures and discharges the ovum. Prior to the rup- ture of the ovisac, preparation for the detachment of the ovum from the enveloping and supporting cells of the dis- cus proligerus has been made by the formation of numerous vacuoles in the mound, as shown in Fig. 24. The attachment of the ovum is rendered
. The diseases of the genital organs of domestic animals. Horses; Genital Diseases, Male -- veterinary; Genital Diseases, Female -- veterinary. Ovulation 49 3. Ovulation At about the close of estrum, in those animals where the phenomena have been studied, as in the cow, the distended ovisac ruptures and discharges the ovum. Prior to the rup- ture of the ovisac, preparation for the detachment of the ovum from the enveloping and supporting cells of the dis- cus proligerus has been made by the formation of numerous vacuoles in the mound, as shown in Fig. 24. The attachment of the ovum is rendered exceedingly frail, subject to de- tachment upon the slightest disturbance. The ovum is ap- parently maintained in situ chiefly, if not wholly, by the Corona. vadiata. pelluci^ Fig. 24âSection of ovary of cow â with a nearly ripe ovum in an ovisac, 5x7 mm., showing vacuoles in the cumulus preparatory to ovulation. sustaining pressure of the follicular liquid. When the ovi- sac ruptures, the ovum, the follicular fluid, and some of the granular cells of the discus proligerus in which the ovum was embedded are discharged into the pavilion of the ovi- duct, which is at this epoch erected and closely applied to the ovary at that point where the ovisac is about to rupture. Here, if successful copulation has occurred, spermatozoa are already present, meet the ovum and a single spermatozoon fuses with each, to constitute fertilization. The precise period at which ovulation occurs, as related to estrum, has not been determined for all domestic animals. In the rabbit, which has given birth to young, copulation. 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 Williams, W. L. (Walter Long), 1856-1945; Williams, Walter Wilkinson, 1892-. Ithaca, N. Y. : The Author
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecthorses, bookyear1921
