What is flatus?

Flatus refers specifically to gas that builds up in the digestive system and is expelled through the anus. This gas is commonly generated during the digestive process when bacteria in the intestines break down food, especially foods that are high in fiber. The release of this gas can occur through the anus in the form of what is commonly known as passing gas or flatulence.

Understanding this definition helps clarify the physiological processes related to digestion and can enhance one's comprehension of human anatomy and bodily functions. The other definitions pertain to different bodily processes; for instance, fluid expelled during breathing concerns respiratory functions, while solid waste refers to feces, and fluid inside the intestines relates to the digestive system but does not specifically describe the gas released. Thus, the choice that defines flatus accurately captures its role in human digestion.