By: Keenan Faix and Timmy Lee Nematoda (Roundworm) (fake) http://www.ento.csiro.au/science/nematodes/nem_monster.gif By: Keenan Faix and Timmy Lee

Sample Animals Soybean Cyst Nematode Unidentified Species of a Nemotoda (class Adenophorea) http://images.google.com/imgres?imgurl=http://protist.i.hosei.ac.jp/pdb/Images/Multicell/Nematoda/sp_2.jpg&imgrefurl=http://protist.i.hosei.ac.jp/pdb/Images/Multicell/Nematoda/index.html&usg=__h_xLCz2q_2IJmbqA9ayKv6gl4nc=&h=484&w=606&sz=73&hl=en&start=52&um=1&itbs=1&tbnid=rO1sJUizZXHsCM:&tbnh=109&tbnw=136&prev=/images%3Fq%3Dnematoda%26start%3D36%26um%3D1%26hl%3Den%26safe%3Doff%26client%3Dsafari%26sa%3DN%26rls%3Den%26ndsp%3D18%26tbs%3Disch:1 Soybean Cyst Nematode http://en.wikipedia.org/wiki/File:Soybean_cyst_nematode_and_egg_SEM.jpg

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

Body Symmetry Bilateral Symmetry http://bioweb.uwlax.edu/bio203/s2009/maiers_andr/nematode%205.bmp

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

Circulatory System None - No blood system http://www.bu.edu/gk12/eric/nematode.jpg

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

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

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

Skeletal Type None http://www.inra.fr/hyppz/DESSINS/8032041.gif

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

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

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

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

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

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

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

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