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!!!!Inverts 3
Phylum Nematoda
12
Biology
Undergraduate 4
11/24/2009

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Term
body
Definition
long, slender, tapered ends; some pseudocoelomate, some acoelomate; no cilia or flagella, adult tissues eutelic
Term
cuticle
Definition
thick, collagen fibers
Term
muscles
Definition
longitudinal, no circular
Term
movement
Definition
cuticle bends, doesnt stretch, high interval hydrostatic pressure
Term
respiration
Definition
no specialized organs
Term
circulatory
Definition
no specialized organs
Term
excretion
Definition
no nephridia; glandular renette system w/ canals
Term
feeding and digestion
Definition
linear, complete gut; mouth->pharynx(esophogus)->intestine->rectum->exit anus
Term
nervous system
Definition
anterior brain; muscles send signald to nerve cords (unusual/opposite)
Term
sensory system
Definition
detect and respond to environmental cues: ocelli: eyes; mechanical stimulation (bristles ,vibrations);chemical cues (pharamones)
Term
reproduction
Definition
most gonochoristic
Term
parasitic forms
Definition
hook worms, pin worms
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