poison gland

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Poison gland

The specialized gland of certain fishes, as well as the granular glands and some mucous glands of many aquatic and terrestrial Amphibia. The poison glands of fishes are simple or slightly branched acinous structures which use the holocrine method of secreting a mucuslike substance. The poison glands of snakes are modified oral or salivary glands. Amphibian glands are simple, acinous, holocrine, with granular secretion. In some cases these amphibian poison glands produce mucus by a merocrine method of secretion. These glands function as protective devices. See Gland

McGraw-Hill Concise Encyclopedia of Bioscience. © 2002 by The McGraw-Hill Companies, Inc.

poison gland

[′pȯiz·ən ‚gland]
(vertebrate zoology)
Any of various specialized glands in certain fishes and amphibians which secrete poisonous mucuslike substances.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Piperideine alkaloids from the poison gland of the red imported fire ant (Hymenoptera: Formicidae).
The venom distribution system begins with the venom or poison glands, moving on to the venom-conducting tube or duct through which the venom travels into the venom canal in the fang.
Enlightenment may come from years of dedicated training, a moment of grace, or an infusion of the neurotransmitter 5-MeO-DMT, found in all mammals, many plants, and the poison glands of a toad.
Ultrastructure of poison glands of South American frogs: A comparison between Physalaemus albonotatus and Leptodactylus chaquensis (Anura: Leptodactylidae).
The toad's two large poison glands can kill a predator within 15 minutes of an attempted attack on the toad.
He strongly denied as A"false rumoursA" that the charmers remove the fangs and poison glands of the snakes.A"If that is true why are there casualties among us?A" he asked.
They have specialized poison glands in their tails that make them undesirable to most predators.
The toxin from red lionfish poison glands doesn't taint the meat, he says.
These and many other species of spiders with special cellular adaptations in poison glands, silk producing glands and other tissues that produce a variety of proteins (Palmer et al.
Poison glands (also called granular glands) release toxic substances that keep predators away.
The crime scenes are known habitats of otters, he said, and they bite the legs off frogs and toads to avoid contact with poison glands on their skin.
Biting compresses poison glands in the reptile's lower jaw.