| Phylum | Level of Organisation | Symmetry | Coelom | Segmentation | Digestive System | Circulatory System | Respiratory System | Distinctive Features |
|---|---|---|---|---|---|---|---|---|
| Porifera | Cellular | Various | Absent | Absent | Absent | Absent | Absent | Body with pores and canals in walls |
| Coelenterata | Tissue | Radial | Absent | Absent | Incomplete | Absent | Absent | Cnidoblasts present |
| Ctenophora | Tissue | Radial | Absent | Absent | Incomplete | Absent | Absent | Comb plates for locomotion |
| Platyhelminthes | Organ and Organ System | Bilateral | Absent | Absent | Incomplete | Absent | Absent | Flat body,suckers |
| Aschelminthes | Organ System | Bilateral | Pseudocoelomate | Absent | Complete | Absent | Absent | Often worm-shaped,elongated |
| Annelida | Organ System | Bilateral | Coelomate | Present | Complete | Present | Present | Body segmentation like rings |
| Arthropoda | Organ System | Bilateral | Coelomate | Present | Complete | Present | Present | Exoskeleton of cuticle,joined appendages |
| Mollusca | Organ System | Bilateral | Coelomate | Absent | Complete | Present | Present | External skeleton of shell usually present |
| Echinodermata | Organ System | Radial (Adult) | Coelomate | Absent | Complete | Present | Present | Water vascular system |
| Hemichordata | Organ System | Bilateral | Coelomate | Absent | Complete | Present | Present | Worm-like with proboscis,collar,and trunk |
| Chordata | Organ System | Bilateral | Coelomate | Present | Complete | Present | Present | Notochord,dorsal hollow nerve cord,gill slits |
Explore More
| List $I$ | List $II$ |
| $A$. Pleurobrachia | $I$. Mollusca |
| $B$. Radula | $II$. Ctenophora |
| $C$. Stomochord | $III$. Osteichthyes |
| $D$. Air bladder | $IV$. Hemichordata |
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