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

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👇 Select Your Topic Here 👇

• Topic 1: Basis of Classification
• Topic 2: Porifera
• Topic 3: Cnidaria
• Topic 4: Ctenophora
• Topic 5: Platyhelminthes
• Topic 6: Aschelminthes
• Topic 7: Annelida
• Topic 8: Arthropoda
• Topic 9: Mollusca
• Topic 10: Echinodermata
• Topic 11: Hemichordata
• Topic 12: Chordata - up to Sub phylum Vertebrata
• Topic 13: Chordata - Cyclostomata, Pisces
• Topic 14: Chordata - Tetrapoda