Nematoda (roundworms) 2009.pdf

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Ecdysozoa : protostomes that molt (ecdysis) Nematoda (Gk. nema = thread) Slender cylindrical body 1. Pseudocoelomate w/ high hydrostatic pressure 2. Collagenous cuticle 3. Complete digestive system w/ muscular pharynx 4. Mostly dioecious 5. Longitudinal muscles, no circular muscles 6. No circulatory system 7. Renette cells for excretion 8. Brain & longitudinal nerve cords 9. Amphids (anterior) a. Phasmids (posterior) b. Sensory organs 10. Free-living nematodes Caenorhabditis elegans Pasted from < ~simmons/16cm05/1116/16anim4.htm > Turbatrix aceti (vinegar eel) Pasted from < ories/Water%20Pollution.htm > Ascaris life cycle Pasted from < -
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