The best reason I can think of for why we believe that air is a mixture is that freezing air slowly yields different liquids at different temperatures. Liquid nitrogen has a different boiling point than liquid oxygen. They also freeze at different temperatures.
An inguinal hernia is a protrusion of abdominal-cavity contents through the inguinal canal. Symptoms are present in about 66% of affected people. This may include pain or discomfort especially with coughing, exercise, or bowel movements. Often it gets worse throughout the day and improves when lying down.
An inguinal hernia is the bulging of the small intestine into the inguinal canal in the groin. The inguinal canal is a tube-like structure in the lower abdomen on either side of the groin. About 20% of males suffer from inguinal hernia compared to 2% women.1.