Explain the physiological mechanism of sneezing.

The respiratory system of the body is very delicate and the ingress of foreign particles can be fatal. For the respiratory system, only gaseous substances are unimpeded, and solid particles can damage the integrity of tissues. To avoid this, there is a sneezing mechanism. When something irritates the epithelium of the respiratory system, a reverse mechanism is triggered, which leads to the release of air at a speed of 170 km / h, and at the same time bacteria, dust, spores or something else.