Vocabulary Ch. 11 Zoology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Elongated with an anterior head, containing the mouth and certain nervous and sensory structures. | Head-foot
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| Contains the organs of digestion, circulation, reproduction, and excretion and is positioned dorsal to the head-foot. | Visceral Mass
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| Attaches to the visceral mass, enfolds most of the body, and may secrete a shell that overlies the body. | Mantle
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| 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
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| A rasping structure which consists of chitinous belt of rows of posteriorly curved teeth. | Radula
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| A 180 degree counterclockwise twisting of the visceral mass, mantle, and mantle cavity in gastropods. | Torsion
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| Examples include snails and slugs | Gastropoda
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| A rolled extension of the mantle that serves as an inhalant tube. | Siphon
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| Circulatory system with no true vessels and the blood bathes the cells of tissue in open spaces. | Open Circulatory System
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| Open spaces where tissues and organs are bathed in blood. | Sinuses
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| The oldest part of the shell which is a swollen area near the shell's anterior margin in Bivalves. | Umbo
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| Muscles that hold bivalves closed when they are threatened. | Adductor muscles
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| Containing a single sex organ on each individual in a species. | Dioecious
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| Containing both sex organs on one individual of a species. (Hermaphrodite) | Monoecious
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| Created when bacteria or sand particles get lodged between the Mantle and shell in certain bivalves. | Pearl
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| Within the cavity of the Cephalopods which allows them to break up shells when feeding. | Beak
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| Used in defense to blind attackers. | Ink
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| Circulatory system in which all the blood is contained within vessels throughout the body. | Closed Circulatory System
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| Cephalopods can change colors in their pigment cells by contracting and expanding these structures. | Chromatophores
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| Cephalopods contain many compacted ganglia within a cartilaginous skull forming this unique structure in invertebrates. | Brain
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| Examples include squid, octopus, nautilus, and cuttlefish. | Cephalopoda
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| Examples include clams, oysters, mussels, and scallops. | Bivavlia
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