File:ThielDowney1921 plate02.jpg

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Plate 2

4 Section of zi venous sinus in the spleen of a, 24-min. pig embryo. Some of the mesenchyme cells lining the sinus are elongated into typical reticulo-endothelial struutiircs. The cell (encZ0.c.) on the right wall shows strongly basophilic eyt-oplasin and a nucleus similar to that of :1 large lymphocyte. The cell is being cut off from the mesenchyme.

5 A group of hemocytoblasts in the rnesenchyinc of the spleen of a 4—cm. pig embryo. The structure of the nuclei of cells A and B is intermediate between tliat of the mesenchyme cell, n7,c.~'.r:,, and the lymphocytoblast C.

6 A slightly oblique section of an artery and surrounding mesenchyme in the spleen of at 735-0110. pig embryo. The presence of numerous small and mediumsized dark nuclei indicates the beginning of the differentiation of small and medium-sized lymphocytes from the mesenchyme.


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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Thiel GA. and Downey H. The development of the mammalian spleen, with special reference to its hematopoietic activity. (1921) Amer. J Anat. 28(2): 279 - 339.


Cite this page: Hill, M.A. (2024, June 23) Embryology ThielDowney1921 plate02.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:ThielDowney1921_plate02.jpg

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