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Apologia Marine Bio
Apologia Marine Biology Module 5 Vocabulary
| Question | Answer |
|---|---|
| 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 provide both 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 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 fused 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 echinderms 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 |
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