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 passageway that carries air from nose to the alveoli and from alveoli to the nose makes up the respiratory tract. The respiratory tract is divided into upper (nose, nasal cavity, sinuses and pharynx) and lower (larynx, trachea, bronchi, bronchiole, and alveoli) respiratory system.