. The physiology of reproduction. Reproduction. 574 THE PHYSIOLOGY OF REPRODUCTION Sections through the gland show that it still consists entirely of ducts, but that these are in a state of active proUferation. The epithehal lining no longer consists of a single cellular layer, but is two or three cells deep, while the individual cells are more swollen than those of the virgin gland, and mitotic figures are commonly seen. The mammary gland now grows rapidly, so that on about. Fig. 139.—Section of developing mammary gland of horse. (From Schafer, after Hamburger.) 8, sebaceous glands ; v, blood
. The physiology of reproduction. Reproduction. 574 THE PHYSIOLOGY OF REPRODUCTION Sections through the gland show that it still consists entirely of ducts, but that these are in a state of active proUferation. The epithehal lining no longer consists of a single cellular layer, but is two or three cells deep, while the individual cells are more swollen than those of the virgin gland, and mitotic figures are commonly seen. The mammary gland now grows rapidly, so that on about. Fig. 139.—Section of developing mammary gland of horse. (From Schafer, after Hamburger.) 8, sebaceous glands ; v, blood-vessels. the ninth day after conception, on reflecting the skin from the abdomen, the entire surface is found to be covered with a layer of glandular tissue, the margins of the individual glands being practically contiguous, each of them having a diameter of from five to eight centimetres. Sections show that the formation of alveoli { definite secretory structures) has begun at this period, especially at the periphery, where the gland is generally somewhat thicker than in other parts. From this stage onwards the growth of the ducts and the. 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 Marshall, F. H. A. (Francis Hugh Adam), 1878-1949; Cramer, William, 1878-1945; Lochhead, James. London, New York, Longmans, Green
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
