• Through the gastrointestinal tract (GIT) the body is provided with a constant supply of water, electrolytes and nutrients
  • This process requires:
  the movement of food through the tract

the secretion of digestive juices and digestion of the food

the absorption of the digestive products, water & electrolytes

the circulation of blood through the GIT organs to carry away absorbed substances

the control of this these systems by both neuronal and hormonal systems