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Marine Biology

Module 5 Vocabulary

Mantle A sheath of tissue surrounding the organs of a mollusk, producing the mollusk's shell and performing respiration
Radula An organ covered with hundreds of small teeth, used for scraping food into the mouths of mollusks
Chitin A derivative of carbohydrates that provides both flexibility and support
Open circulatory system A circulatory system in which blood flows out of the blood vessels and into body cavities, where it comes in direct contact with cells
Closed circulatory system A circulatory system in which the blood always remains in vessels
Molting The process of shedding an exoskeleton and replacing it with a new one
Cephalothorax The anterior part of an arthropod body, consisting of a head and other body segments used together
Carapace An armored shield that covers the anterior portion of crustaceans
Water vascular system A network of water-filled canals in echinoderms, used for locomotion and feeding
Ambulacral groove A channel along the oral surface of echinoderms through which the tube feet protrude
Notochord A flexible supportive rod that runs the length of the body of the chordates
Dorsal nerve cord A long bundle of nerve cells located along the dorsal part of an organism's body
Created by: mrpicard