Why do we sneeze.

Title: The Science Behind Sneezing Sneezing is a reflexive response triggered by irritants in the nasal passages or throat. When these irritants, such as dust, pollen, or viruses, stimulate the nerve endings inside the nose, the brain sends signals to the muscles involved in the sneeze reflex. The purpose of sneezing is to expel these irritants from the respiratory tract quickly before they can cause harm. With a sudden and forceful expulsion of air, sneezing helps clear the nasal passages and remove potentially harmful substances. During a sneeze, the muscles in the chest and abdomen contract, while the diaphragm relaxes, causing a sudden increase in pressure in the lungs. This pressure forces air out through the nose at speeds of up to 100 miles per hour, along with any irritants present. While sneezing is primarily a protective mechanism, it can also be triggered by other factors, such as sudden exposure to bright light (photic sneeze reflex) or nasal congestion. However, in most cases, sneezing serves as the body's defense against respiratory irritants, helping to keep the airways clear and healthy.