Chordates | Non-chordates |
1. Notochord is present at least in some stage of life cycle | Notochord is absent |
2. Nerve cord is non-ganglionated, single, dorsal and hollow | Nerve cord is ganglionated, double ventral and solid |
3. Pharyngeal gill slits are present | Absent |
4. A post anal tail is present in some stages or throughout life | Post anal tail is absent |
5. Ventral heart is present | Dorsal heart is present |
6. Haemoglobin is present in RBC | Haemoglobin when present is in the blood plasma |
7. Endoskeleton and exoskeleton are present | Generally exoskeleton alone is present |
8. Hepatic portal system is present | Hepatic portal system absent |
9. Eyes are derived from brain | Eyes are derived from the skin |
10. Blood flow is forward in ventral vessel and backward in dorsal vessel | Blood flow is back ward in ventral vessel and forward in dorsal vessel |
Comparison between chordates and non-chordates
Animals, Chordata, Comparison, Non-chordata, Zoology
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