
1) Biological cooler
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https://www.crosswordclues.com/clue/sweat-gland

either of two types of secretory skin glands occurring only in mammals. The eccrine sweat gland, which is controlled by the sympathetic nervous ... [7 related articles]
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http://www.britannica.com/eb/a-z/s/195

A small gland in the skin of a mammal that secretes a salty fluid solution (sweat). Excess body heat causes the sweat to evaporate, which brings about cooling. Sweat glands are formed from the epidermis but project deep into the dermis. They occur over most of the body surface in humans and other hi...
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http://www.daviddarling.info/encyclopedia/S/sweat_gland.html

a gland that secretes perspiration through a pore in the skin
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http://www.encyclo.co.uk/local/20899

one of the glands that secrete sweat, found in the dermis or subcutaneous tissue, and opening by a duct on the surface of the body. There are two types, the apocrine and eccrine sweat glands. A sweat gland is innervated by cholinergic nerve fibers of the parasympathetic nervous system and can also be stimulated by the hormones epinep...
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http://www.encyclo.co.uk/local/21001

Sweat gland: The sweat (sudoriferous) glands are small tubular structures situated within and under the skin (in the subcutaneous tissue). They discharge sweat by tiny openings in the surface of the skin. The sweat is a transparent colorless acidic fluid with a peculiar odor. It contains some fatty acids and mineral matter. It is also called perspi...
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http://www.medterms.com/script/main/art.asp?articlekey=9301

A skin gland that secretes a fluid substance for evaporative cooling.
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http://www.mhhe.com/biosci/abio/glossary.mhtml

The sweat that dampens the skin comes from the eccrine glands. They lie in the subcutaneous tissue (hypodermis) just under the dermis. The human body has between two and three million eccrine glands that secrete moisture on the skin primarily to cool the body through evaporation. The eccrine glands react to signals from the hypothalamus in the brai...
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http://www.probertencyclopaedia.com/browse/ES.HTM

[
n] - any of the glands in the skin that secrete perspiration
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http://www.webdictionary.co.uk/definition.php?query=sweat%20gland

one of numerous tubular glands embedded in the dermis that secretes the watery substance known as perspiration
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https://courses.lumenlearning.com/microbiology/chapter/glossary/
sudoriferous gland noun any of the glands in the skin that secrete perspiration
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https://www.encyclo.co.uk/local/20974

Gland within the skin of mammals that produces surface perspiration. In primates, sweat glands are distributed over the whole body, but in most other mammals they are more localized; for example, in cats and dogs they are restricted to the feet and around the face
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https://www.encyclo.co.uk/local/21221

one of the minute, coiled, tubular glands of the skin that secrete sweat.
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https://www.infoplease.com/dictionary/sweat-gland
No exact match found.