Question

Jacobson's organ can be traced in
A. Pisces
B. Aves
C. Mammalia
D. Reptilia

Answer 1

Jacobson’s organ is a type of chemoreception organ. It is also known as the vomeronasal organ. This organ is a part of the auxiliary olfactory sense system. It is located on the nasal septum which is mainly concerned with the receiving of smell.

Complete step by step answer: Jacobson’s organ is also called the vomeronasal organ. This organ was first discovered by Danish anatomist Ludwig Levin Jacobson and the organ is named after the discoverer. This organ is a chemoreceptor organ. This belongs to the accessory olfactory sense system. This organ is mainly found in amphibians, reptiles especially in lizards and snakes. It is a combination of sensory cells that can be noticed in the main nasal chamber just above the roof of the mouth.
Jacobson’s organ is able to identify the heavy moisture-borne odour particles. Airborne odours are also detected by the olfactory sensory organ. The organ consists of a paired structure and the both paired have an elongated C-shaped lumen and surrounded by a cartilaginous capsule that opens into the base of the nasal cavity. This organ is fully developed in crocodilians, turtles, and birds.
Jacobson’s organ is most helpful in the process of intimating via chemical messages such as the formulation for sexual activity. This communication takes place between the members of the same species. This organ is used by snakes to hunt and track their prey. This organ may also be used for the identification of chemical signals related to aggression and territoriality.
Therefore, the correct option is option D.

Additional information: Jacobson’s organ can be found in mammals which is responsible for the flehmen response of those mammals. This helps in the detection of liquid organic chemicals to the organ. In those cases, Jacobson’s organ connected to the oral cavity. In humans, this organ is present but it is reduced to being non-functional and vestigial.

Note: Jacobson’s organ is a chemoreceptor organ which is a part of the accessory olfactory sense system. This organ is associated with the smell. This sense organ can be traced mainly in reptiles, especially snakes and lizards. It is considered as an organ which communicates chemical messages. It helps the snake to sense its surroundings and also helps in hunting the prey.