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Nematoda - Roundworms Examples: Trichinosis-causing, Filarial, Ascarid , Hookworms

Unsegmented worms that have psedocoelems and digestive systems with two openings. Nematoda - Roundworms Examples: Trichinosis-causing, Filarial, Ascarid , Hookworms. Roundworms. Roundworms. Environment Soil Salt Flats Water- from polar to tropics. Food Source

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Nematoda - Roundworms Examples: Trichinosis-causing, Filarial, Ascarid , Hookworms

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  1. Unsegmented worms that have psedocoelems and digestive systems with two openings. Nematoda- RoundwormsExamples: Trichinosis-causing, Filarial, Ascarid, Hookworms

  2. Roundworms

  3. Roundworms

  4. Environment • Soil • Salt Flats • Water- from polar to tropics Food Source • Predators that use body parts to catch, grasp, and EAT. • Soil dwellers/Aquatic-eat decaying matter.

  5. Homeostasis- Internal Circulation- Relies on diffusion. Respiration- No internal transport system Excretion- Diffusion to carry nutrients and waste through body.

  6. Homeostasis- External Response • Simple nervous systems- ganglia • Nerves that run length of body transmit sensory info and movement. • Posses sense organs that can detect chemicals given off by prey or hosts.

  7. Movement Muscles extend throughout body together with fluid in pseudocoelem make up hydrostatic skeleton Reproduction sexually and have individual sexes Evolutionary Milestone Pseudocoelom – internal body cavity lacking mesodermal lining

  8. Pictures and Vocabulary Copy this drawing Or Figure 27-7 Page 689 Vocabulary Pseudocoelom 689 Anus 689

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