Like a wind tunnel, the nasal passages cause turbulence in inspired air, allowing it to touch the inner walls of the nose and draw moisture and heat from our mucosa and blood vessels. The shape of the ...

All done. Now, let’s try drawing a sad face. Like before, let's draw an oval for the head. Now, draw an upside-down smile. A sad nose is the same as a happy nose. The eyes often close a little ...