The concepts of digestion and absorption; Characteristics of gut smooth muscle; The character, component and function of消化和吸收的概念；消化管平滑肌的特性；胃液的性质、成分和作用；胃的容受性舒张和蠕动；小肠运动的形式；主要营养物质在小肠内的吸收及机制。