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Difference between non chordatas and chordates |
| Answer» \t\xa0ChordatesNon-ChordatesNotochordPresence of cord or notochord.Absence of cord or notochord.LimbsLimbs are two pairs.Limbs may be more than two pairs.HeartHeart is ventral with hemoglobin, RBC and limbs.\xa0Heart is in a dorsal or lateral position with limbs.ExamplesFrog, fish, bird, reptiles, amphibians and mammals.Cockroach, earthworms, flatworms, jellyfish, sponges, insects, water bears, and other arthropods, annelids and protozoans.Post **** tailThey have post **** tail associated with them.\xa0No post **** tail is present in non-chordates.Circulatory SystemChordates have a closed circulatory system.Usually open circulation of blood takes place in non-chordates.Nerve CordDorsal, hollow and single nerve cord is present in chordates. The nerve cord is without ganglia.Ventral, solid and double nerve cord is present. The nerve cord of non-chordates have ganglia.Gill slitsPharyngeal gill slits are present.Pharyngeal gill slits are absent.RespirationRespiration occurs through the gills or lungs in chordates.Respiration occurs through trachea, gills or body surface in non-chordates.Body fluidHemoglobin is present in chordates.Hemoglobin is absent, instead, hemolymph is present which is analogous to bloods in the vertebrates.Germ layerTalking about the germ layer, chordates are triploblastic.Talking about the germ layer of non-chordates, they can be diploblastic, triploblastic or neither.\xa0SymmetryThese animals are bilaterally symmetric.These animals can be bilateral, bi-radial, asymmetrical or radial.CoelomatesThey are true coelomates.They can either be true coelomates, acoelomates or pseudocoelomates.ExoskeletonExoskeleton is present in some of the chordates, for example, tortoises.Exoskeleton is present in all non-chordates.EndoskeletonEndoskeleton is present in chordates.Endoskeleton is absent in non-chordates.RegenerationChordates have poor regeneration.Non-chordates have good regeneration, mostly.****The **** of these animals is differentiated and opens before the last segment.**** in these animals is usually absent and if present, it opens on the last segment.BrainThe brain of chordates is present, and located dorsal to the pharynx in head.Brain is not as complex as that of chordates if present in some of the animals.OrganizationThey have a body with an organ system.Their body organization is protoplasmic to the organ system.\t | |