👉 The septum is a structure that separates the nasal cavity from the upper respiratory tract. It is composed of two parts: the nasal septum, which is the outer wall of the nose, and the septal cartilage, which is the inner wall of the nostrils. The septum is lined with an epithelium called the alveolar type, while the septal cartilage contains a layer of connective tissue called the submucosa.
