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Vocabulary Review. Ch 35 – Mollusks and Annelids. A free-swimming, ciliated larva of many worms and some mollusks. Trochophore. The central section of a mollusk’s body that contains the mollusk’s organs. Visceral mass. In biology, a layer of tissue that covers the body of many invertebrates.

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vocabulary review

Vocabulary Review

Ch 35 – Mollusks and Annelids

slide7
A rasping, tonguelike organ that is covered with chitinous teeth and that is used for feeding by many mollusks

Radula

a mollusk that has a well developed head and a flattened foot such as a snail slug or conch
A mollusk that has a well-developed head and a flattened foot, such as a snail, slug, or conch

Gastropod

the fluid that circulates through the body of an animal that has an open circulatory system
The fluid that circulates through the body of an animal that has an open circulatory system

Hemolymph

slide11
An aquatic mollusk that has a shell divided into two halves connected by a hinge, such as a clam, oyster, or mussel

Bivalve

a marine mollusk that has tentacles extending from the head an octopus squid cuttlefish or nautilus
A marine mollusk that has tentacles extending from the head; an octopus, squid, cuttlefish, or nautilus

Cephalopod

slide16
In polychaete annelid worms, one of the two flap-shaped appendages that are used for locomotion or gas exchange

Parapodium

slide17
In the digestive systems of birds and some invertebrates, a sac or pouch that temporarily stores food

Crop

slide18
An enlargement of the digestive tract of some invertebrates, such as annelids and insects, that grinds food

Gizzard

slide19
In some animals, an infolding of the intestinal wall that increases the surface area available for digestion

Typhlosole

slide20
A muscular blood vessel that links the blood vessels from the dorsal and ventral parts of an animal’s body

Aortic arch

in leeches and earthworms a thick depression of the body wall that functions in reproduction
In leeches and earthworms, a thick depression of the body wall that functions in reproduction

Clitellum

slide24
A carbohydrate that forms part of the exoskeleton of arthropods and other organisms, such as insects, crustaceans, fungi, and some algae

Chitin