Digestion 3070

Mer av detta

The Digestive System(Mrs Shum)

av Serena Shum

Marine & Freshwater Ecosystem

av aina atikah

HUMAN NUTRITION

av Andrea Lenti Pitarch

YOSHE-BIOLOGY-chemical breakdown of food

av yoshe watson

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