Vertebrates | Invertebrates |
1. Notochord is present in the embryo and vertebral column in the adult | Notochord and vertebral column are absent in embryo and adult |
2. Gill slits are present | Absent |
3. Nerve cord is single, hollow and non-ganglionated | Nerve cord is double, solid and ganglionated |
4. Cranium is present | Absent |
5. Post-anal tail is present | Absent |
6. Two pairs of appendages for locomotion | Many pairs when present |
7. Heart is ventral to the alimentary canal | Heart is dorsal to the alimentary canal |
8. Blood flows forward ventrally and backward dorsally | Blood flows forward dorsally and backward ventrally |
9. Haemoglobin is present in RBC | Haemoglobin if present is dissolved in plasma |
10. Endoskeleton is present | Absent |
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