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.
The uppermost portion of the human respiratory system, the nose is a hollow air passage that functions in breathing and in the sense of smell.The nasal cavity moistens and warms incoming air, while small hairs and mucus filter out harmful particles and microorganisms.he flow of air from outside of the body to the lungs begins with the nose, which is divided into the left and right nasal passages. The nasal passages are lined with a membrane composed primarily of one layer of flat, closely packed cells called epithelial cells.