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http://www.britannica.com/EBchecked/topic/299124/Jacobsons-organ
an organ of chemoreception that is part of the olfactory system of amphibians, reptiles, and mammals, although it does not occur in all tetrapod groups. It is a patch of sensory cells within the main nasal chamber that detects heavy moistureborne odour particles. Airborne odours, in contrast, are detected by the olfactory sensory cells located in the main nasal chambers. Some groups of mammals also initiate a behaviour known as the flehmen response, in which the animal facilitates the exposure of the vomeronasal organ to a scent or pheromone by opening the mouth and curling the upper lip during inhalation.
This organ was named for its discoverer, Danish anatomist Ludvig Levin Jacobson, in 1811. It is a paired structure; in the embryo stages of all tetrapods, each half arises as an evagination of the floor of a nasal sac. In fully developed crocodilians, turtles, birds, cetaceans, and many advanced primates, this structure is absent or substantially underdeveloped. For most tetrapods that possess a Jacobson's organ, ducts connect the organ directly to the nasal cavity; however, in squamates (lizards and snakes) each organ opens on the roof of the buccal cavity (mouth). The tongue carries odour particles from the outside to the vomeronasal openings on the roof of the mouth, and the particles then move into the vomeronasal organ. After these particles reach the organ, some of the chemical compounds they contain bind to receptor molecules, and sensory messages are sent to the brain.
The Jacobson's organ is useful in the process of communicating chemical messages, such as readiness for sexual activity, between members of the same species. The organ also helps snakes hunt and track their prey. Much evidence suggests that this organ may also be involved in the detection of chemical signals related to aggression and territoriality. See also chemoreception.
George R. Zug
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In the back of the mouth, before the wisdom teeth
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To play a mouth organ, place the instrument between your lips and blow and draw air through the holes to produce different notes. By controlling your breath and mouth position, you can create melodies and chords. Practice scales, songs, and techniques to develop your skills.
What if black holes are actually planets with an atmosphere that does not reflect back any light?
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When giving mouth to mouth resusitation why is the head held back and the lower jaw upward?
Holding the head back and lifting the lower jaw helps to open the airway and allow for better air flow during mouth-to-mouth resuscitation. This position helps ensure that the person's airway remains clear and unobstructed for effective breathing support.
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What was that green thing mr sir puts in his mouth in the movie holes?
a mouth guard
How many holes does a man have?
Define holes? You have two ear holes, two eye holes, two nostrils, mouth, ureter and anus. And then women have another one.
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there are finger holes a tube and the mouth-piece.
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Where can you find glory holes in San Jose?
If yours is black my mouth will be your glory hole
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Collander
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The Nare is a nostril, a frogs nostrils or breathing holes above his mouth.
What holes are in the body?
Eyes, nose, mouth, ears, anus, genitals and hair follicles.
What do penguins mouth look like?
Male Penguins look just like female Penguins. Black back, White chest.
When you light a torch from inside the skull from which places light will come out?
From all of the holes in it. That's the eye sockets, the nose cavities, the mouth, and possibly the ear holes.
Where is the hair on whales located?
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