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33 Cards in this Set
- Front
- Back
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Branchial hearts |
accessory hearts associated with each gill- cephalopoda |
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Captacula |
specialized thin tentacles used to capture small food particles from surrounding sediment/water - Scaphopods |
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Cerata |
brightly colored dorsal projections- Opisthobranchia |
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Chromatophores |
tiny colored skin cells overlaying reflective cells which can be used for camouflage or to dazzle prey |
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countercurrent exchange |
molluscan gill system wherein blood and oxygenated water flow in opposite directions |
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crystalline style |
rotating translucent rod which draws food into the stomach and aids in mechanical digestion |
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funnel |
flexible, hollow tube used to expel water for jet propulsion- cephalopoda |
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glochidia |
microscopic nonswimming larvae that develop as external parasites before becoming benthic juveniles |
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hectocotylus |
highly modified cephalopod arm used for sperm packet transfer |
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hemocoel |
blood cavity comprised of blood sinuses- hydrostatic skeleton |
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hemocyanin |
a protein similar to hemoglobin but containing copper instead of iron |
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mantle |
specialized tissue that secretes shell components |
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columella |
central axis of a snail shell |
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exhalant siphons |
dorsally located exit siphon |
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inhalant siphons |
ventrally located intake siphon |
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nephrostome |
kidney-mouth, at opening of nephridia |
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nephridiopore |
renal pore through which penultimate urine is discharged into the mantle cavity |
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periostracum |
shell thin outer layer |
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prismatic |
thick calcareous middle layer of a mollusc shell |
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nacreous |
thin innermost calcareous layer of a mollusc shell |
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radula |
firm ribbon of chitin and protein with 2 rows of sharp teeth |
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odontophore |
cartilage-like, supports radula |
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trochophore |
larval stage resembling polychaete annelids |
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veliger |
a larva with a distinct ciliated organ called a velum |
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needham's sac |
a pouch opening into the mantle cavity where large numbers of spermatophores are stored |
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neotenic |
slowed evolution of nongonadic structures |
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operculum |
a rigid disc of protein within the foot |
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osphradium |
chemical and tactical receptor organ within the mantle |
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pen |
squid shell- thin, stiff, proteinaceous sheet inside the body cavity |
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pneumostome |
single small opening for air or water to enter the lung |
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rhinophores |
a second pair of tentacle-like structures located dorsally, believed to be chemosensitive- opisthobranchs |
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spermatophores |
sperm packets |
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umbo |
bulge on the shell dorsal surface, adjacent to the hinge |
