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.
List the major organs of the respiratory system and describe the function of each. a. Noseâair enters the respiratory tract through the nostrils. The surface of the nasal cavities is moist from mucus and warm from blood flowing just under it, so as air passes through this area it is humidified and warmed.