Invertebrate and vertebrate are the two groups where all the animal kingdom is classified. There is much difference between invertebrate and vertebrate. However, the significant difference is the body system of invertebrate and vertebrate. The main difference is that invertebrates do not have a spinal column or a backbone, for example, insects and flatworms. While, vertebrates have a spinal column or a backbone, having a good skeleton structure. Examples of vertebrates include humans, snakes, and birds.
Invertebrates can be simply identified as animals that don’t have a backbone. They hold more than 97 percent in the animal kingdom with many species of animals.
For example, annelids, arthropods, bivalves, coelenterates, echinoderms, squid, sponges, snails, and octopus belongs to invertebrates. There is some classification in invertebrates having external skeletons for insects and mollusks have. The lack of supportive system, many invertebrates are smaller in size.
As discussed above, the vertebrates have a unique backbone. The spinal cord runs along the body between caudal and cranial regions connecting to the nerve tissues. Examples of vertebrate include the members of Chordates, mammals, birds, fish, reptiles, and amphibians. The main characteristics of the vertebrates have bilaterally symmetrical bodies and brain covered by the skull.
Difference Between Invertebrate And Vertebrate
|Animals do not have a backbone.||Animals with backbone.|
|No cell walls, multicellular||Well-developed brain, Internal skeleton, advanced nervous system and cellular skin|
|Flatworms, insects are few examples||Humans, snakes, birds are few examples.|
|Small and slow-moving||Big in size|
|97 percent of animal species are invertebrates.||Only 3 percent animal species are vertebrate.|
|Nearly 2 million named, and many millions of invertebrate are not yet identified||57,739|
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