GROSS ANATOMY

Detailed explanation-1: -Segments. The nasal cavity is divided into two segments: the respiratory segment and the olfactory segment.

Detailed explanation-2: -This cavity is divided into two separate cavities by the septum and kept patent by a bone and cartilaginous framework. Each cavity consists of a roof, floor, medial wall, and lateral wall. Within each cavity are three regions; nasal vestibule, respiratory region, and olfactory region.

Detailed explanation-3: -The septum divides the nasal cavity into right and left halves. The nasal cavity is connected with a number of structures. The olfactory nerves penetrate the roof of the nasal cavity and the cribriform plate and innervate the superior nasal concha and the upper third of the septum.

Detailed explanation-4: -The nasal cavity is divided into left and right sides by a wall of cartilage and bone (called the nasal septum).

Detailed explanation-5: -Air enters the nasal cavity from the outside through two openings: the nostrils or external nares. The openings from the nasal cavity into the pharynx are the internal nares. Nose hairs at the entrance to the nose trap large inhaled particles.