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Simethicone works by changing the surface tension of gas bubbles in the stomach and intestine * [[Gastrointestinal tract]]: The part of the digestive system that includes the stomach and intestines.

...ort personnel who assist operation of such vehicles. This population often works and lives in remote, isolated, extreme, or enclosed environments under cond ...o autoimmune disease, organ transplantation, or malignancies of the immune system.

* [[ABO blood groups]] - The system by which human blood is classified, based on proteins occurring on red bloo ...n the bottom of the ribs and the top of the thighs, containing most of the digestive and urinary systems along with some reproductive organs