Introduction Concepts of digestion and absorption Characteristics of the smooth muscle of gastrointestinal tract Secretory function of digestive gland Neural control of gastrointestinal tract Endocrine function of gastrointestinal tractIntroduction Characteristics of the smooth muscle of gastrointestinal tract Neural control of gastrointestinal tract Secretory function of digestive gland Endocrine function of gastrointestinal tract Concepts of digestion and absorption