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special features of arthropoda?

Phylum Arthropoda

The word ‘Arthropoda’ means ‘animals with jointed legs’. It is the largest phylum of the animal kingdom and includes more than 900000 species.

General features of arthropods

  • They are found everywhere on Earth.
  • An arthropod has a segmented body like that of an annelid. The body is divided into three regions—the head, the thorax and the abdomen.
  • The body is covered by an exoskeleton made of chitin.
  • Arthropods have an organ system level of organization.
  • They show bilateral symmetry. They are triploblastic animals. Schizocoelom is present.
  • They have certain advanced features.
  • A distinct head is present. There are jointed legs for moving around.
  • An open circulatory system is present, i.e., blood does not flow in well-defined blood vessels. Thus, their coelomic cavity is filled with blood.
  • Examples of arthropods: crab, Palaemon (prawn), insect, spider, scorpion, centipede, millipede, cockroach, housefly, mosquito

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Arthropoda have jointed legs.

They are the largest phylum in animal kingdom

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Phylum Arthropoda (arthro= joint;poda= foot) is the most numerous phylum of all living organisms, both in number of species and in number of individuals. One, very conservative, estimate is that there are well over one million species of insects alone. In terms of number of individuals, there are more ants than anything else, and in terms of numbers of species, there are more kinds of beetles than anything else: 40 to 50% of all insect species are beetles. There are more species of insects than all other plants and animals together.

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Phylum Arthropoda (arthro= joint;poda= foot) is the most numerous phylum of all living organisms, both in number of species and in number of individuals. One, very conservative, estimate is that there are well over one million species of insects alone. In terms of number of individuals, there are more ants than anything else, and in terms of numbers of species, there are more kinds of beetles than anything else: 40 to 50% of all insect species are beetles. There are more species of insects than all other plants and animals together.

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Here is a detailed description:

Phylum Arthropoda (arthro= joint;poda= foot) is the most numerous phylum of all living organisms, both in number of species and in number of individuals. One, very conservative, estimate is that there are well over one million species of insects alone. In terms of number of individuals, there are more ants than anything else, and in terms of numbers of species, there are more kinds of beetles than anything else: 40 to 50% of all insect species are beetles. There are more species of insects than all other plants and animals together.

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The following are the characteristics of the phylum arthopoda:

  • it is the most numerous phylum
  • the organisms of this phylum have joints in their legs
  • one or more pair of wings are present
  • three or more pair of legs are present
  • they have compound eyes
  • the blood do not flow in blood vessels, i.e they have an open ciculatory system
  • the coelomic cavity is filled with blood
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jointed legs

open blood circulatory system

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