4. Animal Kingdom
Phylum Ctenophora (Comb Jellies): General Characters
- Grades of Organization: Tissue grade.
- Symmetry: Radial symmetry.
- Germ Layers: Diploblastic
- Coelom: Acoelomate
- Habit and Habitat:
- Exclusively marine.
- Solitary & pelagic
- Digestive System:
- Incomplete.
- Intracellular & extracellular digestion.
- Respiratory System: Absent
- Circulatory System: Absent
- Reproduction:
- Only Sexual.
- Hermaphrodite.
- External fertilization.
- Development is indirect.
- Unique Features:
- Locomotion is by 8 vertical external rows of ciliated comb plates.
- Tentacles present.
- Shows Bioluminescence (property to emit light from the body).
- Examples:
- Ctenoplana
- Pleurobrachia
Select Topic 👇
- 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