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. ZugThe nostrils.
osculum and ostia are the holes in the sponge that can be used as mouths
Black holes aren't actually holes, they're just humongous 'objects' that are so big that they have huge gravitational pulls and therefore pull everything into themselves, hence the name 'holes'.
They were (I believe) traditionally used as buttons, attached by thread through the holes. Or they may have been a decoration on clothing.
white spots in the back of the mouth are common in people who take inhalers for copd . white spots in the mouth are also a hint that the patient has aids
In the back of the mouth, before the wisdom teeth
a mouth guard
Define holes? You have two ear holes, two eye holes, two nostrils, mouth, ureter and anus. And then women have another one.
there are finger holes a tube and the mouth-piece.
yes: nostrils, mouth, ears
osculum and ostia are the holes in the sponge that can be used as mouths
Women have 3, their mouth, vagina,& anus
If yours is black my mouth will be your glory hole
Collander
Eyes, nose, mouth, ears, anus, genitals and hair follicles.
The Nare is a nostril, a frogs nostrils or breathing holes above his mouth.
Male Penguins look just like female Penguins. Black back, White chest.
From all of the holes in it. That's the eye sockets, the nose cavities, the mouth, and possibly the ear holes.