Placement of Jacobson's organ in a snake. The VNO is found at the base of the nasal cavity. It is split into two, being divided by the nasal septum, with both sides possessing an elongated C-shaped, or crescent, lumen. It is encompassed inside a bony or cartilaginous capsule which opens into the base of the nasal cavity. [9]

2017年1月13日 · The VNO of snakes and lizards, except for chameleons, is well developed and contains the sensory epithelium of the dorsal dome and the non-sensory epithelium that lines the ventral concha, which is called the mushroom body.

2025年3月21日 · The Snake’s Secret Sense: Unveiling the Mysteries of the Jacobson’s Organ. The Jacobson’s organ, also known as the vomeronasal organ (VNO), is a crucial sensory tool for snakes, functioning primarily as a specialized chemoreceptor.It enables snakes to “smell” or, more accurately, detect non-airborne chemical cues gathered by their forked tongues.

The VNO may be derived from the recess epithelium or fish-type OE and differentiate into the mammal-type VNO and snake-type VNO. The primary olfactory centers are divided into mammal-type main olfactory bulbs (MOB), fish-type MOB and …

2020年9月22日 · Despite the diverse morphology of the adult squamate naso-palatal complex – consisting of the nasal cavity, vomeronasal organ (VNO), choanal groove, lacrimal duct and superficial palate – little is known about the embryology of these structures.

2013年1月24日 · Snakes, which have a very large VNO associated with a sophisticated tongue delivery system, are missing from this analysis. Here, we use RNA-seq and RNA in situ hybridization to study the diversity, evolution, and expression pattern of the corn snake vomeronasal receptor repertoires.

2021年4月19日 · The vomeronasal organ (VNO) is sensory organ located in the ventral region of the nasal cavity in rodents. The VNO develops from the olfactory placode during the secondary invagination of olfactory pit.

2017年1月13日 · The vomeronasal organ and the associated structures (such as the lacrimal duct, choanal groove, lamina transversalis anterior and cupola Jacobsoni) of adult lizards and snakes have received much anatomical, histological, physiological and behavioural attention.

stimulation of the VNO. Garter snakes follow prey trails at chance levels following VN nerve lesions [Kubie and Hal­ pern, 1979]. These animals, with considerable preoperative training, cease attack and ingestion of prey within a matter of a few days following cuts of nerves from the VNO [Kubie and Halpern, 1979].

2011年9月21日 · To gain insight into the molecular logic of VNO detection leading to mating, aggression or defensive responses, we sought to uncover the response profiles of individual vomeronasal receptors to a...