. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. Fig. 82.—Mammary gland of an eight weeks old mouse showing rapidly growing end- bulbs. (X65.) lined by several layers of cuboidal epithelial cells which contain mitotic figures (16, 35, 93) (Fig. 82). Increased mitotic activity and formation of the end-bulbs of the distal ducts at the approach of each estrus has been noted by several Fig. 83.—Developing mammary gland on the ii-th day of pregnancy. (X20C.) A gradual increase in the epithelial elements of the gland by cell division is
. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. Fig. 82.—Mammary gland of an eight weeks old mouse showing rapidly growing end- bulbs. (X65.) lined by several layers of cuboidal epithelial cells which contain mitotic figures (16, 35, 93) (Fig. 82). Increased mitotic activity and formation of the end-bulbs of the distal ducts at the approach of each estrus has been noted by several Fig. 83.—Developing mammary gland on the ii-th day of pregnancy. (X20C.) A gradual increase in the epithelial elements of the gland by cell division is evident during the first part of pregnancy (Fig. 83). This increase reaches its peak at about the iith-i2th day, and results in the formation of alveoli. By the 14th to 15th day of pregnancy the alveolar system is well developed and mitosis is infrequent. Further development consists of an increase in size of the epithelial cells and an enlargement of the lumina of the ducts and alveoli. Secretor}' activity is established gradually, starting first in the alveoli proximal to the nipple and progressing distally. In the cytoplasm. 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 Roscoe B. Jackson Memorial Laboratory; Little, Clarence C. (Clarence Cook), b. 1888; Snell, George D. (George Davis), 1903-; Dingle, John H. (John Holmes), 1908-. Philadelphia, The Blakiston company
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Keywords: ., boo, bookcentury1900, bookcollectionbiodiversity, booksubjectmice
