The “vestibule of the nostril” (vesti-bü-lum—la-ti-num), or simply “vestibule”, and in Latin “vestibulum vestibuli” is a small protrusion of the upper part of the nostril opening, connecting the arch of the vestibule with the lower wall of the nasal septum.
Anatomically, the vestibule is a small, rudimentary respiratory organ, the place of birth and development of a large number of sensory nerve endings, mucous glands, and processes (hairs).
Each inner nostril has its own vestibule, that is, it divides lobe by lobe. There are small openings on the arch of the nostrils - these are the choanae. At the bottom, the nasal septum is divided on each side into two more sub-lobes and into each process, through which it is connected to the vestibule. During the intrauterine development of the embryo, a substance is released that deforms the medial lower wall of the nasal septum, which in Latin is called “Ebner’s septum.” As a result, it deviates from the walls of the inner nose, hence the vestibule is subsequently formed.
In addition to the vestibules, in each half of the nose there is also an upper nasal cavity, into which cavities open, where air passes. From the inside, it is separated from it by the nasal septum, behind which are the superior and inferior nasal turbinates. Behind the oral septum from above (outside) is the nostril passage. The nostril cavity passes into the maxillary cavity and through the choana into the oral cavity. The oral cavity differs from the nasal cavity in the presence of teeth, tongue, lips, soft palate and small labial passages.