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Annelids

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pudixoyo's version from 2017-09-25 23:58

Section 1

Question Answer
What are Annelidsmarine worms, earthworms, leeches
What is metamerismDivision of body into sections
Each segment of an annelid has what?duplicate (paired) excretory, nervous, and circulatory structures
What are the advantages of metamerism?-creates hydrostatic compartments that create supportive and locomotive functions. / lessens impact of injury / permits tagmatization (modification of body regions for specialized functions (feeding, locomotion, reproduction)
Annelids have a _____ digestive system..complete
___ pumps food from mouth to ____ and expands into ___Pharynx, crop (for storage), gizzard (for grinding)
______ glands remove excess calciumcalciferous
_____ is the site of digestion and absorptionintestine
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Section 2

Question Answer
respiratory gases diffuse across body wall (________)no lungs or gills
___ circulatory system with dorsal and ventral blood vessels (one way flow) and connecting capillariesclosed
_______ pumps bloodcontractile tissue in vessels
paired, large _______ in head regionganglia
ventral nerve cord with paired segmental ____ in each segmentganglia
____ to light, chemical, and mechanical stimulation on body surface criticalreceptors
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Section 3

Question Answer
most annelids have ____; one pair per body segmentmetanephndia
many also have ___ tissue (breaks down amino acids and serves like primitive liver)chlloragogen
Class Polychaeta: ____annelid classlargest
Polychaeta is in what kind of habitatmarine
Polychaeta locomotion ->parapodia with setal (bristles) - also assist in gas exchange. move by walking with parapodia, crawling with undulations, or swimming.
Some Polychaeta are ___ and live in ____sedentary, tubes
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Section 4

Question Answer
Class Polychaeta - ___ cephalization than other annelidsgreater
What is the lobe dorsal and anterior to the mouth that contains numerous sensory organs, including antennae and eyesprostomium
Some polychaeta are predators with an extensible _____ proboscis (some with poison glands)
Other polychaeta are ____herbivores, scavengers, or detritivores
Fan worms ____filter feed
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Section 5

Question Answer
All polychaetes can _____ lost segmentsregenerate
Some polychaetes reproduce by _______fission or budding
most polychaetes are ______ with _____ fertilization and _____ larvaedioecious, external, trochophore
What is epitokyEpitoky is a form of reproduction observed in polychaete marine worms.
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Section 6

Question Answer
Class clitellata includesearthworms, leeches
___ used in clitellata cocoon formationClitellum
clitellata is _____monoecious
subclass of clitellata that is earthwormsoligochaeta
what habitat are oligochaetaterrestrial, freshwater or marine
oligochaeta lackparapodia
what helps anchor the aligochaetasatae
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Section 7

Question Answer
oligochaeta locomotionmove with contraction of muscles-- small satae help anchor worm.
small conical ___ acts like a wedge while oligochaeta is burrowingprostomium
oligochaeta feeds ondetritus and vegetation
soil is swallowed which is important to decomposition
How do oligochaeta reproducemonoecious ( sexually via fertilization, exchange sperm)
oligochaeta have a cocoom of mucous produced byclitellum
____ is deposited in cocoon where fertilization takes placealbumen
has ___ larvaeNO larvae
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Section 8

Question Answer
Another name of leeches in subclass clitellatahirudinea
habitat for hirudineamost freshwater, some marine or terrestrial
lack ____, satae absent in most (hirudinea)parapodia
very little _____ (hirudinea)cephalization
____ on posterior and anterior ends (hirudinea)suckers
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Section 9

Question Answer
body form and locomotion of hirudinealost internal metameric partioning, resulting in single hydrostatic activity.
move in ___ motion looping
feeding on blood of vertebratesectoparasitic
___ and ___ in saliva of hirudineaanesthetic and anticoagniant
hirudinea has a reproduction similar to oligochaetes ( clitellum only present in spring)
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