Life Science - Chapter 15
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Created by:
cjones7787 on January 30, 2012
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SEXY AND I KNOW IT IS ON!!!! bahahaha
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32 terms
Terms | Definitions |
|---|---|
 aortic arches | organs that help to control blood pressure in earthworms |
| bilateral symmetry | a type of symmetry in which there are two equal sides to an animal; only one possible plane will divide it into equal halves |
| capillary | one of many small blood vessels that have walls that are one cell thick; materials are exchanged between the blood and other body tissues in the capillaries |
| closed circulatory system | a type of circulation in which the blood remains in vessels |
| filter feeder | an organism that obtains food from water circulating through its body |
| ganglion | a mass of nerve tissue; sometimes called a simple brain in many invertebrates |
| nematocyst | a type of stinging cell possessed by cnidarians; used for defense or for capturing food |
| nephridia | tubelike structures that filter wastes from the blood in some organisms |
| nerve | a number of neurons arranged side by side and wrapped in a protective covering |
| neuron | a long, thin nerve cell that carries impluses between various parts of the body |
| radial symmetry | a type of symmetry in which several different planes could divide an animal into equal halves |
| sensory receptor | a structure capable of receiving a stimulus from the environment and sending an impluse along a neuron |
| skeleton | a structure in animals and humans which provides mechanical support for muscle attachment and maintaining body shape |
| stimulus | anything that causes a response in an organism |
| vein | in animals a blood vessel that carries blood toward the heart; in plants, the vascular tissues in leaf blades |
| invertebrate | an animal without a backbone |
| porifera | phylum that the animals must have pores; example - sponges |
| cnidarians | phylum that have stinging cells; example - jellyfish |
| plathelminthes | phylum that are flat worms; example - planarian |
| nematoda | phylum that are roundworms; examples - roundworm (ascaris), hookworms, pinworms, trichina worms |
| annelida | phylum that are segmented worms; examples - earthworm, leeches, tubeworms, scale worms, clam worms, and lugworms |
| animals | are living arganisms, eukarotic, multicellular, have organized tissues, and can move |
| gastrovascular cavity | digestive chamber of a jellyfish |
| hard corals | type of corals that help build coral reefs |
| bilateral | type of symmetry of flatworms |
| flame cells and pores | structures that the planarian uses to romove wastes from its body |
| nephridia | structures in the earthworm responsible for collecting wastes |
| ectoderm | the outer tissue layer in a jellyfish |
| spongin | protein component of some sponge skeletons |
| hydrostatic | a type of skeleton similar to a water balloon |
| coral | an animal in the same phylum as the jellyfish |
| two | number of layers of tissue found in a jellyfish |
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