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.
Split and merge into it. Answered by The Community. Making the world better, one answer at a time. The epithelium and blood vessels in the nasal cavity serve to warm and moisturize the air as a person breathes it in. This is to prevent the delicate membranes of the alveoli from being damaged by cold dry air.