Explain Physiology of Gastrointestinal System

In this unit we shall focus on the gastrointestinal system. The gastrointestinal system, you would realize, is also referred to as the digestive system or the alimentary system, which deals with the food we eat. Food, as we all know, is needed as the source of energy, for growth and repair of tissues.

As the food passes through the gastrointestinal tract, it is broken down by some physical factors and enzymes until it is in a form suitable for absorption into the blood. After being absorbed, food is utilized in the body. There are some substances which are neither digested nor absorbed. These are excreted in the form of faeces.