SS2 Biology

Digestive System (I)


Describe with appropriate illustrations of different types of alimentary tracts. Explain the feeding mechanism of some animals. Explain how some insectivorous plants feed.

What you'll learn
  • Types of alimentary tracts
  • Description and functions of parts of the alimentary canal.
  • Modifications of parts to effect their digestive functions.
  • Feeding habits: categories and mechanisms.
  • Feeding in protozoa, hydra and mammals.
  • Modifications in the feeding habits of:
  • (i) Filter feeders.
  • (ii) Fluid feeders.
  • (iii) Insects feeders.
  • (iv) Parasitic and saprophytic feeders.