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Fig. 23-1, p.360
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Table 23-1, p.361
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Fig. 23-2, p.361
ventral
posterior
dorsal
anterior
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Fig. 23-3, p.363
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Fig. 23-6, p.364
choanoflagellates
placozoans sponges cnidarians flatworms rotifers mollusks annelids roundworms arthropods echinoderms chordates
multicelled body
no true tissues true tissues
radial ancestry,two germ layers
protostomes,mouth forms first in embryos
bilateral ancestry,three germ layers
deuterostomes,anus forms first in embryos
fungi
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Fig. 23-7, p.365
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Fig. 23-8, p.365
nucleus
glassystructuralelements
ameboidcell
poresemifluidmatrix
flattenedsurfacecells
collar cell
centralcavity
water out
waterin
water in
flagellum collar of microvilli
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Fig. 23-9, p.366
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Fig. 23-10, p.366
capsule'strigger(modifiedcilium)lid
barbedthread incapsule
nematocyst (capsule at free surface of epidermal cell)
barbs ondischargedthreadexposed
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Fig. 23-11, p.367
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Fig. 23-12, p.367
male medusa
ciliated bilateral larvagrowth of a polypone branch of a colony
ovum sperm
zygote
feedingpolyp
reproductivepolyp
female medusa
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Fig. 23-13, p.368
rudimentarybrain (pair oflarge gangliain head)
branchinggut
pharynx;protrudesonto food,then retractsinto the bodybetweenfeedings
ovary
testis
oviduct
genitalpore
pair of nervecords thathave lateralbranchings
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Fig. 23-14, p.369
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Fig. 23-15, p.369
proglottids
Larvae, eachwith invertedscolex of futuretapeworm,become encysted in intermediatehost tissues (e.g., skeletal muscle).
A human, thedefinitive host, eatsinfected, undercookedbeef, which is mainlyskeletal muscle.
Each sexually matureproglottid has femaleand male organs. Ripeproglottids containingfertilized eggs leave thehost in feces, whichmay contaminate waterand vegetation.
Inside each fertilized egg, an embryonic,larval form develops. Cattle may ingestembryonated eggs or ripe proglottids,and so become intermediate hosts.
oneproglottid
scolexattachedto wall ofintestine
scolex
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Fig. 23-16, p.370
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Fig. 23-17, p.370
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Fig. 23-18, p.371
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Fig. 23-20, p.372
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Fig. 23-21, p.373
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Fig. 23-21, p.373
cuttlebone
arm
jaw
tentacle
radula
siphon
brain esophagus kidney stomach
gillanus ink
sacheart accessory
heartreproductiveorgan
mantle
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Fig. 23-22, p.374
false coelom (unlined body cavity)
intestine eggs in uterus gonad
muscular body wall
pharynx
anus
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Fig. 23-23, p.374
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Fig. 23-24, p.375
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Fig. 23-25, p.376
chelicerae
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Fig. 23-27, p.377
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Fig. 23-32, p.379
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Fig. 23-33, p.380
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Fig. 23-34, p.381
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Fig. 23-34, p.381