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Mollusca

Across
Elongated and tapered shells
Area between mantle and visceral mass
"soft"; unsegmented; bilateral; eucoelomate; triploblastic
2 nephridia located below heart
Modified arm to insert sperm
"stomach-foot"; single valve
Chitons;8 calcareous plates
Open/close shell
Interlocking teeth to keep valves from slipping
To sit on
"head-foot"; use jet propulsion
Contains organs of respiration, circulation, etc
Edge of shell attached to mantle
"blood-sinus";open system in most classes
Down
"Hatchet-Foot"; 2 piece shell; 1 or 2 adductor muscles
Thin membrane surrounds visceral mass
Sinle valve
Tongue-like organ for grating, scraping, and grasping
Pigment cells
Only class to exhibit body segmentation
Brings water in
Push mucus in mouth
Two-piece shell
Bump on the dorsal surface