25+ Differences between Invertebrates and Vertebrates

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Differences between Invertebrates and Vertebrates

Invertebrates (non-chordates) and vertebrates (living things)  (Chordates) make up the majority of the animal kingdom. Those without a vertebral column or backbone are called invertebrates, while those with one are called vertebrates.

Differences between Invertebrates and Vertebrates

CharacteristicsInvertebrates (Non-Chordates)Vertebrates (Chordates)
Radial Bi-radial, or not presentBilateral Symmetry
MetamerismTrue or pseudo metamerism or not presentTrue metamerism
Post-anal tailNot presentGenerally there
Grade of organizationProtoplasmic or organ-systemOrgan System
Germ LayersTwo (diploblastic), Three (Triploblastic) or not presentThree (Triploblastic)
CoelomAcoelomate, pseudocoelomate or Truly coelomateTruly coelomate
Limbs derivationFrom the same segmentFrom numerous segments
NotochordNotochord or Backbone not presentIt is there at certain stage or substituted by a backbone prepared of ring-like vertebrae
Gut positionDorsal to the nerve cordVentral to the nerve cord
Pharyngeal gill-slitsNot presentIs there at certain stage of life
AnusOpens on the last segment or not presentDifferentiated and opens prior to the last segment
Blood vascular systemOpen, Closed or not presentClosed and to a great extent developed
HeartDorsal, Lateral or not presentVentrally placed
Dorsal blood vesselBlood flows anteriorlyBlood flows posteriorly
Hepatic portal systemNot presentPresent
HemoglobinIn plasma or not presentIn red blood corpuscles
RespirationThrough body surface, gills or tracheaeThrough gills or lungs
Nervous SystemSolidHollow
BrainAbove pharynx or not presentDorsal to pharynx in head
Nerve cordDouble, ventral, generally bearing gangliaSingle, dorsal, with no ganglia
Segmental nerve rootsDorsal and ventral roots not separateDorsal and ventral roots separate
ReproductionAsexual reproduction is mainSexual reproduction is main
Regeneration powerGenerally goodGenerally poor
Body temperatureCold-bloodedCold or warm-blooded

 

 

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