The Basic stages of the Digestive process →Ingestion → digestion → absorption→ assimilation → egestion Ingestion – It is the process by which food is taken into alimentary canal. Digestion – It is the process by which ingested (food)material is broken down in the earlier stages of the alimentary canal into a form that can then be absorbed and assimilated into the tissues of the body.Absorption – It is the uptake of fluids or other substances by the tissues of the body. Assimilation – It is the process by which components/chemicals from food are taken into the cells of the body. Egestion – The process of removing the undigested food material from the body through the anus is knownas egestion.