The air reaches the tiny air sacs (alveoli) during the internal A part of the lungs with any dust particles that averted the defences during the nose and airways. The air sacs are vital due to the fact, via them the human body receives oxygen and releases carbon dioxide.Very small hairs named cilia, covering the walls of the air tubes, go the mucus

When someone breathes in, particles suspended within the air enter the nose, although not all of these reach the lungs. The nose is an productive filter. Most substantial particles are stopped in it until eventually They are really eradicated mechanically by blowing the nose or sneezing.Nik worked from the labs of MIT and Regeneron, engaged on proj