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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 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 Mantle
The space between the mantle and body mass in mollusks and brachiopods Mantle cavity
A cluster of nerve cells Ganglion
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 Gastropod
The fluid that circulates through the body of an animal that has an open circulatory system Hemolymph
The blood-filled space or body cavity of some invertebrates Hemocoel
An aquatic mollusk that has a shell divided into two halves connected by a hinge, such as a clam, oyster, or mussel Bivalve
A tube through which water enters the body of a bivalve Incurrent siphon
A tube through which water exits the mantle cavity of a bivalve Excurrent siphon
A marine mollusk that has tentacles extending from the head; an octopus, squid, cuttlefish, or nautilus Cephalopod
One of the external bristles or spines that project from the body of an animal (plural, setae) Seta
In polychaete annelid worms, one of the two flap-shaped appendages that are used for locomotion or gas exchange Parapodium
In the digestive systems of birds and some invertebrates, a sac or pouch that temporarily stores food Crop
An enlargement of the digestive tract of some invertebrates, such as annelids and insects, that grinds food Gizzard
In some animals, an infolding of the intestinal wall that increases the surface area available for digestion Typhlosole
A muscular blood vessel that links the blood vessels from the dorsal and ventral parts of an animal’s body Aortic arch
A tubule through which some invertebrates eliminate wastes Nephridium
In leeches and earthworms, a thick depression of the body wall that functions in reproduction Clitellum
A saclike organ of female or hermaphroditic invertebrates that stores sperm Seminal receptacle
A carbohydrate that forms part of the exoskeleton of arthropods and other organisms, such as insects, crustaceans, fungi, and some algae Chitin