|
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
|
excellent notes
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