Pamphlets on Biology Volume 23; Kofoid Collection book

Pamphlets on Biology Volume 23; Kofoid Collection by Books Group

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Author: Books Group
Number of Pages: 116 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: eBook
ISBN: 9781130691481
File Name: Pamphlets.on.Biology.Volume.23;.Kofoid.Collection.pdf
Download Link: Pamphlets on Biology Volume 23; Kofoid Collection
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...cavities, full of blood and modified on the surface as an epidermis. In some cases parasites were very abundant in all these blood spaces. The epidermal part forms everywhere a complete covering of protoplasm next to the exoskeleton with numerous nuclei in it and cell walls poorly indicated by the methods used. As shown in figures 12 and 13 (pi. 44), and 15 (pi. 45), the epidermis is continuous with the underlying network of connective tissue that has blood in its meshes. In figure 12 (pi. 44) the same continuity is shown in a preparation in which the cellular characterof the epidermis was unusually pronounced. The external face of the epidermis presented various relations to the exoskeleton. Often when the epidermis was artificially drawn away from the exoskeleton, there was a finely fibrous mass, as of a coagulum, extending out from the epidermis, as indicated in figure 12 (pi. 44). In other cases the epidermis almost in contact with the exoskeleton sent out long delicate filaments that seemed to coincide with delicate tubules passing through almost all the thickness of the exoskeleton. feuch tubules were seen chiefly in the walls of the tuberosities and not in the walls of the trumpet. The very much grosser tubules passing to setae are almost entirely absent from the entire annulus though a few-setae were seen near the extreme outer edge as represented on the right of text-figure C. To these few hairs special strands, presumably nervous, pass through the connective-tissue network. Otherwise no nerve tissues and no gland tissues were recognized in any part of the annulus. In some cases the sections seem to have been cut when the epidermis was active in making exoskeleton. That is, the very regular and leads to the complete packing of the recess and tube o...

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