Nutrition and digestion

Abstract

There is some truth to the saying “You are what you eat.” ... Like an assembly line in reverse, the digestive system takes the food we eat and breaks the complex organic molecules into their chemical subunits. The subunits are molecules small enough to be absorbed into the bloodstream and delivered to body cells. Food molecules ultimately meet one of two fates: they may be used to provide energy for daily activities or they may provide materials for growth and repair of the body.