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zoo lab
final ch 9, 11
| Question | Answer |
|---|---|
| phylum Annelida | 'segmented worms, bodies of somites, triploblastic, eucoelomates, bilateral w/closed circulation, well dvpd muscles, excretory and Nervous system w/ganglia |
| phylum annelida classified based on | 'segmentation, setae, clitellum |
| eucoelomate | body' cavity completely lined with a peritoneum that attaches to organs |
| Setae ' | in' annelids stiff bristles present on the body. help earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs are what make it difficult to pull a worm straight from the ground. are largely composed of chitin. |
| clitellum and classes in which it resides' | thickened glandular section of the body wall in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited.oligochaetes (earthworms) and hirudineans (leeches). |
| somites | segments |
| ganglia' | mass of nerve cell bodies |
| class oligochaeta | earthworms-unlimited segmentation, permanent clitellum, most monoecious, terrestreal or aquatic, circular and logitudinal muscles, typhosol, often indicator species |
| e.g. of oligochaeta | Tubifes and lumbricus terrestris |
| monoecious | has both m/f reproductive structures |
| dioecious | contains only m or f reproductive structures |
| typhosol and its purpose | 'inward fold of tissue projecting into lumen of intestine in come annelid grps, incr absorptive surface area of intestine and improve digestive effieciency |
| class polychaeta | sandworm, annelid; unlimited segmentation;parapodia w/setae; lack clitellum; usually dioecious; mst marine; some bioluminescent |
| polychaeta e.g. | Nereis |
| parapodia | paired, feathery extensions along the lateral margins of polychaetes used primarily for respiration adn, to some degree, for locomotion |
| phylum Nematoda | "roundworms"; freeliving and parasitic species; trploblastic; pseudocoelomates; bilateral; have a cuticle taht sheds during Ecdysis; dioecious; often sexually dimorphic; complete digestive system; well dvpd excretory system |
| free living nematodes and e.g. | many in soil; Caenorhabdites elegans (C. elegans)and Turbatrix aceti (Vinegar eels) |
| class Hirudinea | leech, limited segmentation (<= 34); lack parapodia and setae; seasonal clitellum (monoecious); mst aquatic; dorsoventrally flat; medical uses (e.g. Hirudo medicinalis) |
| Parasitic Nematodes and e.g. | vary in size; often prolific; dog heartworm, human pinworm, |
| Dirofilaria immitic | parasitic nematode, dog heartwarm; spread by mosquitoes |
| Enterobius vermicularis | parasitic Nematode; human pinwarms; most common U.S. parasitic worm, infects toddlers often |
| Trichinella spiralis | parasitc nematode; causes Trichinosis; form cysts in muscle tissue |
| Dracunculus medinensis | parasitic nematode, Fuinea worm; live just under skin (medical symbol) |
| Ascaris lumbricoides | parasitic nematode, scum; infects 25% of world pop; 17,000 eggs/day, intestinal rupture; male is smaller w/hooked end |
| ecdysis | shedding of shell |
| prolific | 'Having the quality of generating; producing young |
| sexually dimorphic | ability to see difference in sexes |
| parapodia | paired, un-jointed lateral outgrowths from the bodies of two different invertebrate groups, which are primarily marine in habitat. These structures are characteristic of Polychaeta, and several clades of sea snails and sea slugs.' |
| class hirudinea | leeches, limited segmentation (<= 34); lack parapodia and setae; seasonal clitellum (monoecious); mst aquatic; dorsoventrally flat; medican uses (e.g. Hirudo medicinalis) |
| Lubricus terrestris | class Oligochaeta, Phylum annalida;' |
Created by:
Jamie D
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