Vocabulary Words
- · Mantle- covers the body organs, which are located in the visceral mass
· Mantle Cavity- between the soft body and the mantle, contains gills
· Gills- organs in which carbon dioxide from the mollusk is exchanged for oxygen in the water
· Inside Layer- (of the shell)- smoothest and usually the thickest layer because it’s added to throughout the life of the mollusk; also protects the soft body
· Open Circulatory System- when the heart moves blood out into the open spaces around the body organs
· Gastropods- largest group of mollusks. This classified group includes: abalones, whelks, sea slugs, garden slugs, and conchs. Sometimes called univalves
· Bivalves- mollusks that have a hinged, two-part shell joined by strong muscles. This classified group includes: clams, oysters, and scallops
· Cephalopod- “head-footed” and describes the body structure of these invertebrates: cuttlefish, squids, and octopuses. All are predators too
· Radula- a tongue like organ with rows of teeth to obtain food used by gastropods
· Closed Circulatory System- blood containing food and oxygen moves through the body in a series of closed vessels; only cephalopods use this system
· Newton’s Third Law of Motion- when one object exerts a force on a second object, the second objects exerts a force on the first that is equal and opposite in direction
_Cuttlebone- it is the internalshell of a cuttlefish.
Shipworms- it is a type of bivalve they eat holes in the bottom of boats docks and piece of wood