CIE IGCSE Biology: 复习笔记:7.1.3 Physical Digestion

CIE IGCSE Biology: 复习笔记:7.1.3 Physical Digestion

Chlorophyll

  • Physical Digestion

    • Physical digestion (sometimes referred to as mechanical digestion) is the breakdown of food into smaller pieces without chemical change to the food molecules
    • The processes that take place during physical digestion help to increase the surface area of food for the action of enzymes during chemical digestion
    • It is mainly carried out by the chewing action of the teeth, the churning action of the stomach and the emulsification of fats by bile in the duodenum

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