ANATOMY

Detailed explanation-1: -In the nostrils, air gets warmed and moistened. Tiny hairs in the nose called cilia (SIL-ee-uh) filter out dust and other particles. The nasal cavity and mouth join at the area in the back of the throat called the pharynx (FAR-inks).

Detailed explanation-2: -The mucous membranes in your mouth and nose warm and moisten the air, and trap particles of foreign matter (like dirt and dust). The air passes through the throat into the trachea (windpipe).

Detailed explanation-3: -The inside of your nose is lined with a moist, thin layer of tissue called a mucous membrane (say: MYOO-kus MEM-brayne). This membrane warms up the air and moistens it.

Detailed explanation-4: -As the air passes through the nasal cav ity, mucus and hairs trap any particles in the air. The air is also warmed and moistened so it won’t harm delicate tissues of the lungs. Next, the air passes through the pharynx, a long tube that is shared with the digestive system.