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By: Keenan Faix and Timmy Lee

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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

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