classification of earthworm
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An earthworm is a tube-shaped, segmented worm found in the phylum Annelida. Earthworms are commonly found living in soil, feeding on live and dead organic matter. An earthworm's digestive system runs through the length of its body. It conducts respiration through its skin. It has a double transport system composed of coelomic fluid that moves within the fluid-filled coelom and a simple, closed blood circulatory system. It has a central and a peripheral nervous system. The central nervous system consists of two ganglia above the mouth, one on either side, connected to a nerve cord running back along its length to motor neurons and sensory cells in each segment. Large numbers of chemoreceptors are concentrated near its mouth. Circumferential and longitudinal muscles on the periphery of each segment enable the worm to move. Similar sets of muscles line the gut, and their actions move the digesting food toward the worm's anus.
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Earthworm Belongs to phyllum annelida.
They are Brown in colour.
The body is segmented.
The approximate number of segments is about 100-125 .
They have symmetry which is bilateral.
They made their burrows in soft soil.
Anus is found in the last segment.
They come out from the burrows in the rainy season for copulation .
Their body don't have any skeleton.
Earthworms are hermaphrodite animals.
They are cylindrical in shape.
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