Title: Ascaris Parasitic Worms: Phylum & Classification - Biology Class [2021] | Study.com
Headings: Ascaris Parasitic Worms: Phylum & Classification
Ascaris Parasitic Worms: Phylum & Classification
Ascaris Parasitic Worms
Classification in Phylum Nematoda
Parasitic Action of Ascaris Worms
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Ascaris Parasitic Worms: Phylum & Classification
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Content: A coelom is a body cavity that surrounds the digestive track. In nematodes, their pseudocoelom, or fluid filled cavity, isn't encased in mesoderm but makes direct contact with their intestinal wall. Cross-section of coelomate and pseudocoelomate

What should also be noted is that not all nematodes are parasitic, although, of the approximately 12,000 known species (some estimate that there may be as many 500,000 species because so little is known of their diversity), about half are of the parasitic persuasion. Parasitic Action of Ascaris Worms
Of the 17 species of known Ascaris worms, the two most common species are Ascaris suum and Ascaris lumbricoides, and these helminths can both be found occupying human hosts- gross, right? With that said, A. suum prefers pigs (both domestic and wild alike) but they will certainly take up residence in you or I if given the chance. Ok, so how would they get the chance to invade our bodies? Well, these are a brand of wriggly beast referred to as soil-transmitted helminths, meaning that their unwitting hosts become infected by consuming contaminated soil. Now, I'm sure that might sound pretty silly- it's likely been a long time since you put a fist-full of soil in your mouth but, what about an unwashed fruit or vegetable? I bet you didn't think about that. With that said, let's not swear off strawberries, carrots, and tomatoes just yet- these soil-transmitted helminths are generally localized to areas with poor sanitation as well as areas using human feces for fertilizer.