In the majority of cases, incontinence is caused by a weakening of the pelvic floor muscles that keep the urethra closed. Whenever they lose their elasticity, everyday activities such as laughing, coughing, lifting and running can cause a urine leak.
The respiratory system consists of a group of ducts that are capable of filtering air from the environment before entering the pulmonary system.
Nasal Cavity function: Olfaction, filtration, heating and humidification: The nose has two primary functions. The first is olfaction â the sense of smell. However, the second function is of primary interest to this discussion â filtration, heating and humidification of the inhaled air.