Why is it not advisable to breath through the mouth instead of nose?

There are several reasons why it is not advisable to breathe through the mouth instead of the nose:

1. Filtration: The nasal passages act as a natural filter, trapping dust, pollen, and other airborne particles before they reach the lungs. Mouth breathing bypasses this filtration system, increasing the risk of respiratory infections and allergies.

2. Humidification: The nasal passages humidify inhaled air, which helps to maintain the proper moisture balance in the lungs. Mouth breathing dries out the airways, leading to irritation, coughing, and an increased risk of respiratory infections.

3. Temperature regulation: The nasal passages also help to regulate the temperature of inhaled air, bringing it closer to body temperature before it reaches the lungs. Mouth breathing allows cold, dry air to enter the lungs directly, which can cause discomfort and even respiratory problems.

4. Nasal nitric oxide production: The nasal passages produce nitric oxide, a gas that has several important functions in the body, including regulating blood flow, enhancing immune function, and reducing inflammation. Mouth breathing bypasses the production of nitric oxide, which can have negative effects on overall health.

5. Dental and oral health: Mouth breathing can contribute to dry mouth, which can increase the risk of tooth decay and gum disease. The constant flow of air through the mouth can also lead to a change in the oral microbiome, promoting the growth of harmful bacteria.

6. Sleep disturbances: Chronic mouth breathing during sleep can disrupt normal breathing patterns and lead to sleep disorders such as sleep apnea. This can cause poor sleep quality, excessive daytime sleepiness, and various health problems associated with sleep deprivation.

Overall, nasal breathing is the preferred route for respiration as it provides natural filtration, humidification, temperature regulation, and other important functions that contribute to respiratory health and overall well-being.