1. Roundworms!

2. Phylum Nematoda (roundworms) The Facts … Body symmetry- Bilateral Reproduction- Sexual Movement- thrashing from side to side Food- Parasites.

3. Called Round worms because their bodies are shaped like round tubes Phylum Nematoda (roundworms)

4. Round worms look like tiny pieces of cooked spaghetti with a pointed head and tail. Phylum Nematoda (roundworms) Males have rounded hooked ends Females have straight heads

5. Worms are the simplest animals that have a _____Brain_________. Their brain is more of a cluster of nerve tissue. Phylum Nematoda (roundworms)

6. Porifera and Cnidaria had Two way digestive stystems. Rondworms have a 1 way digestive system. Phylum Nematoda (roundworms) MOUTHANUS Food enters the worms MOUTH, and exits through the ANUS

7. Phylum Nematoda (roundworms) Worms do not have eyes, ears or noses. How can they tell what is around them? __________________________________________ __________________________________________ ___They have sense organs that can detect light and touch. They can detect the vibrations from footsteps.__________________________________ __________________________________________ __________________________________________

8. Phylum Nematoda (roundworms) Nematodes are the most abundant animals on earth, with over _____20,000_________ species identified. They can live in almost any environment on earth.

9. Phylum Nematoda (HOOKWORM) Hookworm (Ascaris) lives in the small intestines of infected humans Eggs are passed in the feces The eggs mature in soil and become a larvae The larvae burrow into the foot or can be ingested Gastrointestinal Symptoms include blood loss Medication can clear up any infection