Another elegant system

The digestive system, composed of the alimentary canal and appendicular structures, is another work of art.
Internally balanced and regulated, this system has evolved some of its features based on the fact that we eat only occasionally (hopefully), at which times it cranks up. In between meals it rests--except for the occasional eruption caused by our symbiotic colonic bacteria doing their fine jobs (it's the sulfur produced by these guys that primarily causes the aroma, not methane, which is odorless).

Appreciate your GI system today by comsuming roughage, drinking lots of water, and only eating when you are hungry (which, by the way, is one of the key differences between normal weight and overweight people--the latter eat based on environmental cues rather than hunger only).