
1) Kidney anatomy
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https://www.crosswordclues.com/clue/renal-medulla

The renal medulla (Latin renes medulla = kidney middle) contains the structures of the nephrons responsible for maintaining the salt and water balance of the blood. These structures include the vasa rectae (both spuria and vera), the venulae rectae, the medullary capillary plexus, the loop of Henle, and the collecting tubule. The renal medulla is ...
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http://en.wikipedia.org/wiki/Renal_medulla

(from the article `renal collecting tubule`) The functions of the collecting tubes are transportation of urine and absorption of water. It is thought that the tissue of the kidney`s medulla, or ... A cross section of a kidney reveals the renal sinus and two layers of kidney tissue distinguishable by their texture and colour. The innermo...
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http://www.britannica.com/eb/a-z/r/32

The centre portion of the kidney. ... (27 Sep 1997) ...
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http://www.encyclo.co.uk/local/20973

the inner part of the substance of the kidney, composed chiefly of collecting tubules, and organized into a group of structures called the renal pyramids.
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http://www.encyclo.co.uk/local/21001

Type: Term Definitions: 1. the inner, darker portion of the kidney parenchyma consisting of the renal pyramids. Synonyms: medulla renalis, medulla of kidney
Found on
http://www.medilexicon.com/medicaldictionary.php?t=53536

(mue-dul;ua) The inner portion of the kidney, including the renal pyramids and renal columns.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml
No exact match found.