The Quarterly Journal of Microscopical Science, Vol. 64: April, 1879 (Classic Reprint) - Hardcover

Author, Unknown

Hardcover

ISBN 10: 0428430643 ISBN 13: 9780428430641

Verlag: Forgotten Books, 2018

Inhaltsangabe

Excerpt from The Quarterly Journal of Microscopical Science, Vol. 64: April, 1879

In the interior of this body is seen a stroma with numerous vascular channels and blood corpuscles, and avascular connec tion is apparently becoming established,if it is not so already, between the glomerulus and the aorta. We have reason to think that the corpuscles and vascular channels in the glomerulus are developed in sitn. The stalk connecting the glomerulus with the attachment Of the mesentery varies in thickness in different sections, but we believe that the glomerulus is continued nu broken throughout the very considerable region through which it extends. This point is, however, difficult to make sure Of owing to the facility with which the glomerulus breaks away.

At the stage we are describing, no true Malpighian bodies are present in the part of the vvolffian body on the same level with the anterior end of the glomerulus, but the vvoltfian body merely consists Of the vvolffian duct. At the level Of the pos terior part Of the glomerulus this is no longer the case, but here a regular series Of primary Malpighian bodies is present (using the term primary to denote the Malpighian bodies developed directly out Of part Of the primary segmental tubes), and the glomerulus of the head-kidney may frequently be seen in the same section as a Malpighian body. In most sections the two bodies appear quite disconnected, but in those sections in which the glomerulus Of the Malpighian body comes into view it is seen to be derived from the same formation as the glomerulus Of the head-kidney (plate II, fig. E). It would seem, in fact, that the vascular tissue Of the glomerulus Of the head-kidney grows into the concavity of the Malpighian bodies. Owing to the stage we are now describing, in which we have found the glomerulus most fully developed, being prior to that in which the head-kidney appears, it is not possible to determine with certainty the position of the glomerulus in relation to the head-kidney. After the develop ment Of the head-kidney it is found, however, as we have already stated, that the glomerulus terminates at a point just in front of the anterior Opening of the head-kidney. It is less developed than before, but is still present up to the period of the atrophy Of the head-kidney. It does not apparently alter in constitu tion, and we have not thought it worth while giving any further representations of it during the later stages Of its existence.

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Details zur Ausgabe

• Verlag: Forgotten Books
• Erscheinungsdatum: 2018
• Sprache: Englisch
• ISBN 10: 0428430643
• ISBN 13: 9780428430641
• Einband: Gebundene Ausgabe
• Anzahl der Seiten: 586
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