. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. HISTOLOGY 135 The spermatozoon is composed of the head, the middle piece and the tail or fiagellum. The head is flattened and hook-shaped, and ranges from . mm. in length with a mean length of .0081 mm. The total length ranges from . mm. with a mean length of .1227 mm. (Figures are based on 30 measurements made by Margaret Nickson.) Fatbody^ 'Caput epididymidis Ductuli efferentes- x -\ -•5,. Corpus epididymidis J—Ductus deferens Testis "Cauda epididymidis Fig. 64.—Drawing of
. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. HISTOLOGY 135 The spermatozoon is composed of the head, the middle piece and the tail or fiagellum. The head is flattened and hook-shaped, and ranges from . mm. in length with a mean length of .0081 mm. The total length ranges from . mm. with a mean length of .1227 mm. (Figures are based on 30 measurements made by Margaret Nickson.) Fatbody^ 'Caput epididymidis Ductuli efferentes- x -\ -•5,. Corpus epididymidis J—Ductus deferens Testis "Cauda epididymidis Fig. 64.—Drawing of the testis, efferent ducts, epididymis and ductus deferens. (X6.) It was mentioned previously that the intertubular tissue contains small groups or cords of interstitial cells of Ley dig. These cells have large round nuclei which contain one, or more often two, nucleoli and rather coarse chromatin granules. The cytoplasm stains intensely with eosin. The excretory ducts of the testis include the rete testis, the efferent ducts, the epididymis w^hich has three parts, the caput, corpus and cauda, and the ductus deferens (Fig. 64). At the hilus the seminiferous tubules are collected into the network of an anastomosing system of canals, the rete testis, which is lined by simple, low cuboidal or at some places flattened epithelium. The network opens into a single lacuna which, outside the tunica albuginea, branches into as many parts as the number of efferent ducts. According to Benoit (6) this number. 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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