internal secretion


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internal secretion

n.
A secretion that is produced by an endocrine gland and discharged directly into the bloodstream; a hormone.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

internal secretion

An outdated term for the secretion of an endocrine gland.
See also: secretion
Medical Dictionary, © 2009 Farlex and Partners

internal secretion

Any secretion absorbed directly into the blood rather than passed out on to an internal surface or to the exterior.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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Macleod pointed out that many eminent scientists had tried to isolate this hormone and failed, without obtaining any conclusive evidence of the existence of an internal secretion (17).
Their work with duct-ligated dogs had been unnecessary, but they had gained knowledge without which they might never have developed the skill and insight to get the internal secretion from an easier source.
There could never be a practical clinical application of the internal secretion of the pancreas unless they could come up with a better way of obtaining pancreatic extract.
Therefore, the fetal pancreas might be a practical source of an extract rich in internal secretion but free from the destructive enzymes of pancreatic juice.
Insulin: discovery and controversy

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