Digestion

r

Why do we need food?Food = Nutritional Molecules FuelBuilding blocks (synthesis during tissue growth/cell turnover)

Feeding Mechanisms

Problems: Undernourishment vs Overnourishment

Animals can either wait or forage for food

SURFACE ABSORPTION

taenia

ENDOCYTOSIS

amoeba

pgagocytosis or phenocytosis

SUSPENSION/ FILTER FEEDING

sessile aquatic animals, sponges, hydra

HERBIVORES

CARNIVORES

DEPOSIT FEEDERS (detritivory)