CLOSED CIRCULATORY SYSTEM- Blood is confined to vessels throughout its circuit around the body
CRYSTALLINE STYLE- proteinaceous, rodlike structure in the digestive tract of a bivalve that rotates against a shield and releases digestive enzymes
FOOD GROOVES- ciliated tracts a long dorsal and ventral margins of the gills of bivalve molluscs. Transport food filtered by the gills toward the labial palps and mouth
GLOCHIDIUM- A larval stage of freshwater bivalves in the family Unionidae. It lives as a parasite on he gills or fins of fishes
HEAD-FOOT- body region of a mollusc that contains the head and is responsible for locomotion as well as retracting the visceral mass into the shell
HYDRAULIC SKELETON- the use of body fluids in open circulatory systems to give support and facilitate movement
LABIAL PALP- chemosensory appendages found on the labium of insects flaplike lob surrounding the mouth of bivalve molluscs that directs food toward the mouth
MANTLE- outer fleshy tissue of molluscs that secretes the shell
MANTLE CAVITY- space between the mantle and the visceral mass of molluscs
ODONTOPHORE- cartilaginous structure that supports the radula of molluscs
OPEN CIRCULAOTRY SYSTEM- a circulatory system found in insects and some other invertebrates in which blood is not cinfined to vessels in part of its circuit
OPERCULUM- cover of the aperture of a snail shell
PROTOSTYLE- rotating mucoid mass into which food is incorporated in the gut of a gastropod
RADULA- mouths of most molluscs that possess a rasping structure
SIPHON- rolled extension of the mantle
TORSION- 180 degree counterclockwise twisting of the visceral mass, mantle, and mantle cavity
TROCHOPHORE LARVA- marine gastropods that have spiral cleavage
VELIGER LARVA- free living larva with foot, eyes, tentacles, and shell
VISCERAL MASS- contains the organs of digestion, circulation, reproduction and excretion and is positioned dorsally to the head foot
CRYSTALLINE STYLE- proteinaceous, rodlike structure in the digestive tract of a bivalve that rotates against a shield and releases digestive enzymes
FOOD GROOVES- ciliated tracts a long dorsal and ventral margins of the gills of bivalve molluscs. Transport food filtered by the gills toward the labial palps and mouth
GLOCHIDIUM- A larval stage of freshwater bivalves in the family Unionidae. It lives as a parasite on he gills or fins of fishes
HEAD-FOOT- body region of a mollusc that contains the head and is responsible for locomotion as well as retracting the visceral mass into the shell
HYDRAULIC SKELETON- the use of body fluids in open circulatory systems to give support and facilitate movement
LABIAL PALP- chemosensory appendages found on the labium of insects flaplike lob surrounding the mouth of bivalve molluscs that directs food toward the mouth
MANTLE- outer fleshy tissue of molluscs that secretes the shell
MANTLE CAVITY- space between the mantle and the visceral mass of molluscs
ODONTOPHORE- cartilaginous structure that supports the radula of molluscs
OPEN CIRCULAOTRY SYSTEM- a circulatory system found in insects and some other invertebrates in which blood is not cinfined to vessels in part of its circuit
OPERCULUM- cover of the aperture of a snail shell
PROTOSTYLE- rotating mucoid mass into which food is incorporated in the gut of a gastropod
RADULA- mouths of most molluscs that possess a rasping structure
SIPHON- rolled extension of the mantle
TORSION- 180 degree counterclockwise twisting of the visceral mass, mantle, and mantle cavity
TROCHOPHORE LARVA- marine gastropods that have spiral cleavage
VELIGER LARVA- free living larva with foot, eyes, tentacles, and shell
VISCERAL MASS- contains the organs of digestion, circulation, reproduction and excretion and is positioned dorsally to the head foot