Oct 22
2.27 Stages of Digestion
understand the processes of ingestion, absorption, assimilation and egestion
Stage 1 - Ingestion Location: Mouth, Teeth, Salivary Glans Outline: Mastication ( chewing) Creates a ball of food for swallowing. Salivary glanes add lubricant for swallowing and also add salivary aminase.Stage 2 - Digestion Location: Intestine, Stomach Outline: Stage where insoluble food particles are digested to become soluble by enzymes
Stage 3 - Absorption Location: Small intestine Outline: Small intestine are structure such as the villi and micro villi which will sbsorb food. Soluble food absorbs in to blood vessels
Stage 4 - Assimilation Location: Tissues and Organs Outline: Digestive food difuses in to cells. Molecules which been absorbed in the blood stream pass to cells to be used
Stage 5 - Egestion Location: Rectum/Anus Large intestine Outline: Removal of undisgested food
