डिस्क्राइब द मूवमेंट ऑफ अर्थवर्म
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An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan, are externally segmented with corresponding internal segmentation, and usually have setae on all segments. They occur worldwide where soil, water, and temperature allow. Earthworms are commonly found in soil, eating a wide variety of organic matter. This organic matter includes plant matter, living protozoa, rotifers, nematodes, bacteria, fungi, and other microorganisms. An earthworm's digestive system runs the length of its body
Each segment has a number of setae or
very small bristles that earthworms use to
help them grip the soil as they move. An
earthworm moves by using two different
sets of nmuscles. Circular muscles loop
around each segment, and longitudinal
muscles run along the length of the body.