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⭐Phylum Annelida⤵
⏩The phylum Annelida includes metametrically segmented animals with a true coelom
⏩Annelids are TRIPLOBLASTIC and bilaterally symmetrical animals with organ-system grade of organization. Annelids show true body segmentation: their bodies are divided into definite sections or segments. Annelids can control each SEGMENT separately and continue to add segments THROUGHOUT life
⏩The body is covered by definite cuticle secreted from the ectoderm. Body wall has both longitudinal and circular muscles. These contracts alternately against the fluid-filled septate coelom during locomotion. Bristles of chaetae(or setae) present on the lower side of the body help grip the ground during locomotion
⏩Annelids have a true coelom(a fluid-filled body CAVITY) and a gut. The coelom is important for the transport of body fluids and discharge of gametes, and it also acts as a hydrostatic skelton
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