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
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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
