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Unformatted text preview: genome project. Ascaris is a parasitic roundworm, and is shown in Figure 25. These worms are unsegmented and have a smooth outside wall. They move by whiplike motions. Mating produces eggs that mature in the soil, limiting most roundworms to to warmer climates. When eggs are swallowed, larvae burrow through the intestinal wall, moving to the liver, heart and/or lungs. Once within the lungs, larvae molt and, after ten days, migrate up the windpipe to throat where they are swallowed. In the intestine, the mature worms mate and the female deposits eggs that are passed out of the body with feces. Feces must reach the mouth of the next host to complete the life cycle, thus, proper sanitation is an important aspect to prevent infection....
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- Fall '10
- Biology, Annelid, Caenorhabditis elegans, Nematode, Phylum Nematoda