Sunday, March 11, 2012

Comparison between vertebrates and invertebrates


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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