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chapter 10 vocab
Word | Definition |
---|---|
mollusk | An invetebrate with a soft, unsegmented body; most are protected by a hard outer shell. |
open circulatory system | a circulatory system in which the heart pumps blood into open spaces in the body, and blood is not confined to vessels |
gastropod | a mollusk with a single shell or no shell |
herbivore | a consumer that eats only plants |
carnivore | a consumer that eats only meat |
radula | a flexible ribbon of tiny teeth in mollusks |
bivalve | a mollusk that has 2 shells held together by hinges and stong muscles |
omnivore | a consumer that eats both plants and animals |
cephalopod | an ocean- dwelling mollusk whose foot is adapted as tentacles that surround its mouth |
arthropod | an invertebrate that has an external skeleton, a segmented body, and jointed appendages |
exoskeleton | a waxy, waterproof outershell or outer skeleton that protects the animal and helps prevent evaporation of water |
molting | the process of shedding an outgrown exoskeleton |
antenna | an appendages on the head of an arthropod that contains sense organs |
crustacean | an arthropod that has two or three body sections, five or more legs and two pairs of antennae. |
metamorphosis | a process in which an animal's body undergoes dramatic changes in form during its life cycle |
arachnid | an arthropod with two body sections, four pairs of legs, and no antennae |
abdomen | the hind section of an arthropod |
insect | an arthropod with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings |
thorax | an arthropod's mid- section, to which its wings and legs are attached |
complete metamorphosis | a type of metamorphosis characterized by four dramatically different stages |
pupa | the third stage of complete metamorphosis, in which an insect changes from larva to an adult |
gradual metamorphosis | a type of metamorphosis in which an egg hatches into a nymph that remembles an adult, and which has no distinct larval stage |
nymph | a stage of gradual metamorphosis that usually remsembles the adult insect |
food chain | a series of events in which one organism eats another and obtains energy |
ecology | the study of how organisms interact with their environment |
producer | an organism that can make its own food |
consumer | an organism that obtains energy by feeding on other organisms |
decomposer | an organism that breaks down chemicals from wastes and dead organisms, and returns important materials to the soil and water |
pollinator | an animal that carries pollen from one plant to another of the same species, enabling plants to reproduce |
pesticide | a chemical designed to kill a pest animal |
biological control | a natural predator or disease used to combat a pest insect |
echinoderm | a radially symmetrical invertebrate that lives on the ocean floor and has an internal skeleton and water vascular system |
endoskeleton | an internal skeleton |
water vascular system | a system of fluid- filled tubes in an echinoderm's body |
tube feet | extensions of an echnoderm's water vascular system that stick out from the body and function in movement and obtaining food |