QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by RAMSAY, J. A. Search for Related Content PubMed PubMed Citation Articles by RAMSAY, J. A.

Journal of Experimental Biology 26,65-75 (1949)
Published by Company of Biologists 1949

The Site of Formation of Hypotonic Urine in the Nephridium of Lumbricus

J. A. RAMSAY ¹

¹ Zoological Laboratory, University of Cambridge

1. Methods for the collection of samples of urine from different parts of the nephridium of Lumbricus are described.

2. The osmotic pressures of these samples have been measured by determination of freezing-point depression and have been compared with the osmotic pressure of the medium surrounding the nephridium.

3. The results of this comparison indicate that the ability to form hypotonic urine is certainly present in the wide tube, is possibly present in the middle tube and is probably not present in the narrow tube.

4. The analogy between the nephridium and the vertebrate nephron is discussed.

This article has been cited by other articles:

				N. Pinel, S. K. Davidson, and D. A. Stahl Verminephrobacter eiseniae gen. nov., sp. nov., a nephridial symbiont of the earthworm Eisenia foetida (Savigny) Int J Syst Evol Microbiol, September 1, 2008; 58(9): 2147 - 2157. [Abstract] [Full Text] [PDF]