A World of Invertebrates

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A World of Invertebrates

Science Bits · ⏱ 2:47 · 62.5K مشاهدة · 6 years ago

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out of the five kingdoms for classifying living organisms the animal kingdom contains by far the greatest number of known species traditionally species were classified into two major groups vertebrates and invertebrates vertebrates are animals with an internal spy column fish and phidian's reptiles birds and mammals in contrast in vertebrates are animals that do not have spinal column however today this classification has become scientifically obsolete surely you still remember that scientists have divided each kingdom of living organisms into large groups called phyla vertebrates represent only the vast majority of the phylum Chordata invertebrates are grouped into approximately 40 different phyla indeed more than 90% of existing animal species are in vertebrates and most of them belong only to eight phylum Porifera or sponges the simplest of all invertebrate cnidarians including corals and jellyfish platyhelminthes flat worms with one opening in the digestive tube which serves as both mouth and anus nematodes round slender worms with differentiated mouth and anus annelids different type of round worm with their body divided into segments molluscs including wide variety of animals such as mussels snails and octopuses echinoderms including sea stars the most prominent representative of this phylum and arthropods characterized by having joined appendages and an external skeleton this phylum includes animals such as ants beetles crabs spiders scorpions and centipedes of all age phylum Arthropoda is by far the one with the greatest number of species and was in this phylum there's group that has the greatest number of species of all the animal kingdom welcome to world almost fully dominated by insects