ANATOMY

Detailed explanation-1: -Nostrils have fine hair to trap dust particles present in the air and stops them from entering our respiratory system. The nostrils are separated by the septum.

Detailed explanation-2: -The hairs present in nasal passage trap the dust particles present in the inhaled air thus allowing only the filtered air to enter into the body. Mucus moistens the air and traps dust particles and kills the bacteria.

Detailed explanation-3: -Certainly! It’s a filter for dust, pollen, spores, viruses and bacteria. Particles stick to the wet surface of your nose hairs, which prevents them from reaching your lungs and causing infection. Eventually you’ll either blow the nasties into a tissue, or swallow them, to be destroyed in your stomach.

Detailed explanation-4: -Tiny hairs called cilia, covering the walls of the air tubes, move the mucus upward and out into the throat, where it is either coughed up and spat out, or swallowed. The air reaches the tiny air sacs (alveoli) in the inner part of the lungs with any dust particles that avoided the defenses in the nose and airways.