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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Content: They belong to the Kingdom Animalia (just like us), and the Phylum Nematoda (from the Greek 'nematos' meaning 'thread'). Nematoda is the phylum containing all roundworm species. But, in spite of the fact that nematodes are 'roundworms', that does not mean that all worms that are round in shape are nematodes. The term nematoda actually refers, not to their body shape, but to their digestive tract, which is tube-like with tapered openings at either end. Nematodes are pseudocoelomates, meaning they have a 'fake' coelom. 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.