File:Kingsbury1932 plate04.jpg

Plate 4

22 and 23 Cat; 35-min. embryo. Tliree sections removed from that of figure 10. A comparison of the differentiation caudal to (fig. 22) and cephalad of (fig. 23) the hypophyseal stalk. The epithelium is below, the fibroblasts of the perichondrium are above. A large and a small lymph channel appear in figure 10; veins are filled with blood. X 240.

24 Cat; 75-mm. fetus. Frontal section of the tonsillar region. Two lymphatic radicles filled with lymphocytes. five blood channels surround the center of the picture. The photograph does not adequately distinguish erythrocytes from lymphocytes. X 285.

25 Cat; near term (130—mm. fetus). Frontal section of the tonsillar region. Lymphatic radicles filled with lymphocytes. The tonsil is now well differentiated. X 285.

26 Cat; 85—to—90~mm. fetus. Frontal section of tonsillar region. A single beginning lymphatic nodule, one of a number. All are broadly in relation to the epithelium. Blood vessels appear above and to the left of the nodule. A gland duct is beneath and to the right. X 285.

27 Cat; 100-mm. fetus. Frontal section through the tonsillar region, dorsal level. The fibrous differentiation (capsule) is at the lower left. Numerous glands are shown. The larger lymphatics are gorged with lymphocytes. Note particularly the junction of channels in the lower center. X 71.

Reference

Kingsbury BF. The developmental significance of the mammalian pharyngeal tonsil - Cat. (1932) Amer. J Anat. 50(2): 201-231.

Cite this page: Hill, M.A. (2024, April 19) Embryology Kingsbury1932 plate04.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Kingsbury1932_plate04.jpg

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