The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy. A more complete definition of gerontology includes all of the following:
Smelly bowel movements are caused by the release of gas. when bacteria, bile or acid mixes with food. Depending on the. food you eat, and where in your digestive tract the mixing. occurs, the combinations can produce various types of gas, all. with different smells.
âº Stool Consistency Diagram. Overview. . Most people open their bowels once or twice a day and the faeces passed are soft, dark brown and with a characteristic smell. They are mainly made up of undigested and indigestible food, mucous membrane, mucus, bacteria and water. The characteristics normal faeces may vary according to age and diet. For instances, if a large amount of fluid is taken the faeces will tends to be soft. A dry diet gives rise to hard faeces.