Postnares is a term used in anatomy to refer to the posterior nares, which are the two openings located at the back of the nasal cavity. These openings play a crucial role in the respiratory system as they serve as the entrances for air to enter the nasopharynx, which is the upper part of the throat that connects to the back of the nasal cavity.
The postnares are located towards the back of the nasal cavity, adjacent to the soft palate, and are covered by a mucous membrane that helps to keep the nasal passages moist and clean. They are slightly tapering in shape and may vary in size and diameter among individuals.
The primary function of the postnares is to allow for the passage of inhaled air from the nasal cavity into the rest of the respiratory system. When we breathe in, air enters the nostrils and travels through the nasal cavity, passing through the postnares and into the nasopharynx. From there, it continues into the lower respiratory system, such as the larynx, trachea, and lungs.
The postnares also serve as an important point of connection between the nasal cavity and the rest of the respiratory system, facilitating the exchange of air between these two regions. This enables functions such as olfaction, humidification, and filtration of inhaled air, as well as vocalization through the movement of air in the upper respiratory tract.
In conclusion, postnares are the posterior openings of the nasal cavity that allow for the passage of air into the nasopharynx and play a vital role in various respiratory functions.
