NEMATODA

Parasitic: Live inside hosts. || Body is covered with up to 9 layers of cuticles. Move in wave-like motions, || Fertilized eggs are deposited within the hosts (parasitic) or in soil (free-living). ||
 * =**NEMATODA**= || Miriam Kim ||
 * **1 Examples** || Roundworms, Pinworms, Hookworms, ||
 * **2 Habitats** || Free-Living Species: Habitat may range from salt water to fresh water, polar to tropic, high elevations to low elevations - but almost always moist areas.
 * **3 Mode of feeding, digestive, excretory** || Oral cavity lined with cuticle including a stylet and pharynx used to suck up food. Digestive glands create enzymes to break down food. No stomach. Pharynx is linked directly to intestine. Nitrogenous waste is excreted through body wall in form of ammonia. ||
 * **4 Internal Transport****(circulation & respiration)** || Lack circulation and respiration systems. Sometimes obtain oxygen requirements through diffusion. ||
 * **5 Symmetry & Support,**===Locomotion, body covering=== || Bilaterally symmetrical.
 * **6 Fertilization &Reproduction****(sexual/ asexual)** || Reproduction is usually sexual.
 * **7 Body Forms (life stage forms)** || Seven stages: egg stage, four larval stages, and two adult stages. ||
 * **8 Defense / senses/ response to environment** || Covered with sensory bristles, ||
 * **9 Nervous system** || Four Nerves: dorsal, ventral and two laterals. Dorsal is for movement, lateral for sensory, and ventral combine the two. ||
 * **10 Importance (how it fits into** **the world)** || Parasitic Nematoda are responsible for many serious plant, animal, and human diseases. ||
 * **Misc.** || Over 28000 types of Nematoda have been described and over 16000 are parasitic. ||