|MadSci Network: General Biology|
Hello Leon Nightcrawlers (earthworms) have five "hearts", arranged in a line near their front end. The following information is from the Naturenorth website, and you might find it interesting to visit and get some more wormy answers. "The body plan of an earth worm is basically a segmented tube. Each segment is a separate fluid-filled compartment surrounding the digestive tract (gut) which runs the length of the worm's body. Many of the worm's internal organs are also segmented, occurring as separate units in each segment, but there is considerable specialization in the head end of the worm. The "brain", "hearts" and other organs are clustered in the head end. Earth worms have no eyes, but they do have cells which are sensitive to light. They do not have ears, but can feel vibrations in the ground. Earth worms don't have lungs, they absorb oxygen directly through their moist skin, which is kept moist by mucous secreting cells. If a worm dries out, it will suffocate." best wishes Mel Williams http://www.naturenorth.com/fall/ncrawler/ncrawlF.html http://res2.agr.ca/london/pmrc/english/faq/earthwor.html#no native Canadian earthworms
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