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.
Describe the principal functions of the respiratory system. 1) Move air into and out of lungs (ventilation) 2) Allow diffusion of respiratory gases between air and blood (respiration) Explain the ultimate physiologic purpose for obtaining oxygen from the air.