1. By: Keenan Faix and Timmy Lee
Nematoda (Roundworm)
(fake)
By: Keenan Faix and Timmy Lee

2. Sample Animals Soybean Cyst Nematode
Unidentified Species of a Nemotoda (class Adenophorea)
Soybean Cyst Nematode

3. Body Cavity (Coelom) Present
Pseudocoelomate –Body cavity is only partially lined by tissue derived from mesoderm

4. Body Symmetry Bilateral Symmetry

5. Has a Pharyngeal Nerve Ring
Nervous System
Has a Pharyngeal Nerve Ring
Essentially a ring of nerves starting near the mouth and extending back into the body

6. Circulatory System None - No blood system

7. Digestive System There is a digestive system with a through gut
Oral cavity opens with a muscular pharynx
Digestive glands found in gut

8. Excretory System
Anus
Removes nitrogenous (ammonia) wastes through the body wall

9. Locomotion Longitudinal Muscles that produce thrashing movement
Muscular layer surrounds body cavity
Filled with blood-lacking fluids

10. Skeletal Type
None

11. Sensory Structures Lateral Nerves are sensory
Ventral Nerves combine both Lateral and Dorsal Nerve functions
Contain sensory bristles and papillae to give a sense of touch
Chemoreception organs near the head

12. Reproduction Sexual Internal fertilization
Zygotes of most species are resistant to harmful conditions
Females may deposit over 100,000 eggs in a day

13. Gas Exchange
Diffusion of gasses across the body wall, or cuticle

14. Other Unique Features
Found in most aquatic habitat, soil, moist tissue of plants, and in body fluids and tissues
Body is covered by tough coat called the Cuticle which molts (sheds) after aging
Many are parasitic

15. What type of body cavity do nematodes possess?
None
Coelomate
Pseudocoelomate
Acoelomate

16. Which is not a function of the Cuticle?
Diffusion of gases
Removal nitrogenous wastes
Movement
For Molting

17. Which one of these is not a Nematode Organ System?
Digestive
Nervous
Circulatory
Excretory

18. What areas do most Nematodes resided in?
Soil
Aquatic habitats
Bodily Fluids and Tissues
Moist Tissues of Plants
All of the above
Volcanoes