Representation of phylum chordata
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★ PHYLUM - CHORDATA:-
• Characteristic features:-
- A notochord
- A dorsal hollow nerve cord
- Paired pharyngeal gill slits
- Post anal tail
- Closed circulatory system
• Symmetry, body cavity, level of organization:-
→ These are bilaterally symmetrical, triploblastic, coelomate with organ-system level of organisation.
→ Phylum Chordata is divided into three subphyla like Urochordata or Tunicata, Cephalochordata and Vertebrata.
→ As we know that subphyla Urochordata and Cephalochordata are often referred to as protochordates.
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