ANATOMY

Detailed explanation-1: -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.

Detailed explanation-2: -Air enters the respiratory system through the nose or the mouth, then travels down a pathway to the lungs. In the nostrils, air gets warmed and moistened.

Detailed explanation-3: -Nostrils (nares): These are the openings to the nasal cavities that are on the face. Septum: The septum is made of bone and firm cartilage. It runs down the center of your nose and separates the two nasal cavities. Sinuses: You have four pairs of sinuses. These air-filled pockets are connected to your nasal cavities.

Detailed explanation-4: -Small openings connect them to the nasal cavity. The sinuses help to regulate the temperature and humidity of air your breathe in, as well as to lighten the bone structure of the head and to give tone to your voice. The NASAL CAVITY (nose) is the best entrance for outside air into your respiratory system.

Detailed explanation-5: -The nose is the only part of the respiratory system that is visible externally and is the route for air entry into the respiratory system. Air is drawn in via the nostrils or external nares and enters the large nasal cavity, which is divided into two by the nasal septum.