Digestion 3070

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MovementofSubstances_KQ

door kaiqing chin

YOSHE-BIOLOGY-chemical breakdown of food

door yoshe watson

Parts of Digestive System

door Andrew Sippel

Water as microbial habitat

door Yap Mei Kee

Digestion

Why do we need food?

Food = Nutritional Molecules

1. Fuel
2. Building blocks (synthesis during tissue growth/cell turnover)

Feeding Mechanisms

DEPOSIT FEEDERS (detritivory)

CARNIVORES

HERBIVORES

SUSPENSION/ FILTER FEEDING

sessile aquatic animals, sponges, hydra

ENDOCYTOSIS

pgagocytosis or phenocytosis

amoeba

SURFACE ABSORPTION

taenia

Animals can either wait or forage for food

Problems: Undernourishment vs Overnourishment