#23 We Mostly Breathe Through One Nostril
When we breathe, the airflow through the nostrils keeps changing every few hours. This is due to an involuntary contraction of the nostrils controlled by the autonomic nervous system.
Our body tends to switch the airflow from one nostril to the other by regulating the blood supply to the erectile tissue present between the nostrils. According to scientists, this alternate switch between the nostrils helps to keep them moist and prevent possible infections.