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Zoology Ch. 11

Vocabulary Ch. 11 Zoology

Elongated with an anterior head, containing the mouth and certain nervous and sensory structures. Head-foot
Contains the organs of digestion, circulation, reproduction, and excretion and is positioned dorsal to the head-foot. Visceral Mass
Attaches to the visceral mass, enfolds most of the body, and may secrete a shell that overlies the body. Mantle
The space between foot and the mantle which is open to the outside and functions in gas exchange, excretion, elimination of digestive waste, and release of reproductive products. Mantle Cavity
A rasping structure which consists of chitinous belt of rows of posteriorly curved teeth. Radula
A 180 degree counterclockwise twisting of the visceral mass, mantle, and mantle cavity in gastropods. Torsion
Examples include snails and slugs Gastropoda
A rolled extension of the mantle that serves as an inhalant tube. Siphon
Circulatory system with no true vessels and the blood bathes the cells of tissue in open spaces. Open Circulatory System
Open spaces where tissues and organs are bathed in blood. Sinuses
The oldest part of the shell which is a swollen area near the shell's anterior margin in Bivalves. Umbo
Muscles that hold bivalves closed when they are threatened. Adductor muscles
Containing a single sex organ on each individual in a species. Dioecious
Containing both sex organs on one individual of a species. (Hermaphrodite) Monoecious
Created when bacteria or sand particles get lodged between the Mantle and shell in certain bivalves. Pearl
Within the cavity of the Cephalopods which allows them to break up shells when feeding. Beak
Used in defense to blind attackers. Ink
Circulatory system in which all the blood is contained within vessels throughout the body. Closed Circulatory System
Cephalopods can change colors in their pigment cells by contracting and expanding these structures. Chromatophores
Cephalopods contain many compacted ganglia within a cartilaginous skull forming this unique structure in invertebrates. Brain
Examples include squid, octopus, nautilus, and cuttlefish. Cephalopoda
Examples include clams, oysters, mussels, and scallops. Bivavlia
Created by: rburrier