Closed Circulatory
System a circulatory system in an
animal in which blood is confined to vessels throughout its circuit
Crystalline Style a protenaceous, rodlike structure in the digestive tract of a bivalve that rotates against the gastric shield and releases digestive enzymes
Food Grooves ciliated tracts along the dorsal and ventral margin of gills f bivalves. These tracts transport food filtered by gills toward the palps and the mouth.
Glochidium a larval stage of freshwater bivalves. It lives as a parasite on gills or fins of fishes.
Head-Foot the 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 flaplike lobe surrounding the mouth of bivalves that directs food toward the mouth.
Mantle the outer fleshy tissues of molluscs that secretes the shell.
Mantle Cavity the space between the mantle and visceral mass.
Odontophore the cartilaginous structure that supports the radula.
Open Circulatory System blood is not confines to vessels in part of its circuit. Blood bathes tissues in blood sinuses.
Operculum the cover of an aperture of a snail shell.
Protostyle a rotating mucoid mass in which food is incorporated in the gut of a gastropod.
Radula the rasping, tonguelike structure that is used for scraping food from a substrate.
Siphon a tubular structure through which fluid flows. Allows water to enter and leave the mantle cavity.
Torsion a developmental twisting of the visceral mass that results in an anterior opening of muscle cavity and a twisting of nerve cords and digestive tract.
Trochophore Larva a larval stage characteristic of many molluscs
Veliger Larva free swimming larval stage that develops from the trochophore and forms rudiments of the shell, visceral mass, and headfoot before settling to the substrate
Visceral Mass region of a mollusc’s body that contains visceral organs
Crystalline Style a protenaceous, rodlike structure in the digestive tract of a bivalve that rotates against the gastric shield and releases digestive enzymes
Food Grooves ciliated tracts along the dorsal and ventral margin of gills f bivalves. These tracts transport food filtered by gills toward the palps and the mouth.
Glochidium a larval stage of freshwater bivalves. It lives as a parasite on gills or fins of fishes.
Head-Foot the 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 flaplike lobe surrounding the mouth of bivalves that directs food toward the mouth.
Mantle the outer fleshy tissues of molluscs that secretes the shell.
Mantle Cavity the space between the mantle and visceral mass.
Odontophore the cartilaginous structure that supports the radula.
Open Circulatory System blood is not confines to vessels in part of its circuit. Blood bathes tissues in blood sinuses.
Operculum the cover of an aperture of a snail shell.
Protostyle a rotating mucoid mass in which food is incorporated in the gut of a gastropod.
Radula the rasping, tonguelike structure that is used for scraping food from a substrate.
Siphon a tubular structure through which fluid flows. Allows water to enter and leave the mantle cavity.
Torsion a developmental twisting of the visceral mass that results in an anterior opening of muscle cavity and a twisting of nerve cords and digestive tract.
Trochophore Larva a larval stage characteristic of many molluscs
Veliger Larva free swimming larval stage that develops from the trochophore and forms rudiments of the shell, visceral mass, and headfoot before settling to the substrate
Visceral Mass region of a mollusc’s body that contains visceral organs