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The absorption of colloidal carbon from the body cavity of Ammocoetes. A study of the structure and function of the larval kidneys and blood forming tissues

✍ Scribed by Theodore W. Torrey

Publisher: John Wiley and Sons
Year: 1938
Tongue: English
Weight: 1010 KB
Volume: 63
Category: Article
ISSN: 0362-2525
DOI: 10.1002/jmor.1050630108

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Colloidal carbon injected into the coelom of the larval lamprey, Ammocoetes, is taken up directly by the pronephric tubules. Due to the absence of nephrostomes the mesonephric tubules do not function in a similar way. The tubules of neither show any intracellular deposition of carbon. The reticular elements which support both these kidneys exhibit pronounced phagocytic and hemocytopoietic activity. Carbon in either a free or included form reaches all the other organs both as a result of direct invasion or secondary distribution by the vascular system. The liver is the only organ whose vascular endothelium exhibits cytopoietic properties. To the diffuse spleen as a site of blood cell formation thus should be added the reticular tissue of the pronephros and mesonephros and the vascular endothelium of the liver. Playing a minor role in a similar way are the intestinal mucosa exclusive of that in the typhlosole and the spongy tissue dorsal to the neural tube.

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