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Morphology of Earthworm

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Morphology of earthworm - definition

  • Earthworms have long cylindrical body, segmented into 100-120 short segments.
  • In a mature worm, segments 14-16 are covered by a prominent dark band of glandular tissue called clitellum.
  • Except the first, the last and clitellar segments, each segment bears setae which helps in locomotion.
  • There are various pores and apertures present in the earthworm. They are for mouth, anus, female genital pore, male genital pore, apertures of accessory glands, spermathecal apertures, nephridiopores and dorsal pores.