Friday, October 23, 2020

Animal Kingdom - Notes | Class 11 | Part 4: Ctenophora

4. ANIMAL KINGDOM

PHYLUM CTENOPHORA (COMB JELLIES): GENERAL CHARACTERS

  1. Grades of organization:
    • Tissue grade.
  2. Symmetry:
    • Radial symmetry.
  3. Germ layers:
    • Diploblastic
  4. Coelom:
    • Acoelomate
  5. Habit and habitat:       
    • Exclusively marine.
    • Solitary & pelagic
  6. Digestive system:          
    • Incomplete.
    • Intracellular & extracellular digestion.
  7. Respiratory system:
    • Absent
  8. Circulatory system:
    • Absent
  9. Reproduction:
    • Only Sexual.
    • Hermaphrodite.
    • External fertilization.
    • Development is indirect.
  10. Unique features:
    • Locomotion is by 8 vertical external rows of ciliated comb plates.
    • Tentacles present.
    • Shows Bioluminescence (property to emit light from the body).
  11. Examples:
    • Ctenoplana 
    • Pleurobrachia

============

👇 Select Your Topic Here 👇

No comments:

Post a Comment