👉 Mesorectums are a group of anatomical structures that include the anterior and posterior part of the nasal cavity. They are located between the nasal septum (the membrane separating the nasal cavity from the paranasal sinuses) and the sinus passages, providing protection to the nose and preventing it from getting infected or swollen. The mesorectums also help regulate the airflow through the nasal passages by opening and closing them when needed.