Term
| Distinguishing Characteristics |
|
Definition
Triploblastics
True coelom (blood filled hemocoel)
Bilateral symmetry
Complete digestive system
Mantle
Body divided 3 ways |
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|
Term
|
Definition
Radual (rasping tongue)
CaCO3 shell
Highly developed sensory organs (particularly in cephalopods) |
|
|
Term
|
Definition
Coelomate
3 sections
Visceral mass covered by a shell
External shell
Radula
Mantle cavity (belt-like feeding structure) |
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|
Term
|
Definition
3 layers
Outer layer (periostracum)- protein layer secreted by mantle cells at outer margin of mantle
Middle layer (prismatic)- thickest of the layers; consists of CaCO3 made with organic matter
Inner layer (nacreous)- thin sheets of CaCO3 alternating w/ organic matter |
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