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| Phylum Aschelminthes |
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 Mostly parasitic (in animals and plants), a few free living called as flukes. |
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 Body is long, cylindrical, fusiform (pointed at both the ends). |
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 Body wall is composed of cuticle, epidermis and musculature. |
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 Presence of a false body pseudocoelom not lined by epithelium. |
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 Digestive system is complete. |
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 Respiration by simple diffusion. |
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 Nervous system consists of a nerve ring and many longitudinal nerve cords. |
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 Only sexual reproduction. Sexes are separate with sexual dimorphism. Males are usually shorter than females. |
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| fig. 10.8 - Examples of Nematodes |
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| Common examples of nematodes, a major group of Aschelminthes. |
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| 1. Rhabditis (free living) |
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| 2. Ascaris (round worm) (parasitic) |
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| 3. Dracuculus (guinea worm) |
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| 4. Enterobium (pin worm) |
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| 5. Trichiuris (whilp worm) |
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| 6. Wuchereria (filarial worm) |
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| 7. Loa loa (eye worm) |
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| fig. 10.12 - Roundworm Anatomy |
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