Phyla Nematoda & Nemertina
Phylum Nematoda - Over 80000 species
- Cylindrical pseudocoeloemates
- Have effective hydroskeleton and musculature
- Inhabit aquatic areas. Many are parasitic.
- Most reproduce sexually. Females can produce ~100,000 eggs a day.
- Tricininella spiralis causes trichinosis in humans from under cooked pork
- Parasite burrows into muscle tissue forming cysts
- Hookworms and pinworms can parasitize digestive systems
- Similar to flat worms
- Inclide proboscus worms
- Acoelomate, but have functioning digestive tract
- Also have a funtioning blood vascular system.
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