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chapter 25 voc
vocab
| Term | Definition |
|---|---|
| pharynx | in free-living flatworms, the tubelike muscular organ that can extend out of the mouth and suck food particles into the digestive tract |
| flame cell | in flatworms, a cilia-lined, bulblike cell that moves water and certain substances into excretory tubules for elimination from the boyd |
| ganglion | group of nerve-cell bodies that coordinates incoming and outgoing nerve impulses |
| regemeration | ability to replace or regrow body parts missing due to predation or damage |
| scolex | parasitically adapted, knob-like anterior end of a tapeworm, having hooks and suckers that attach to the hosts' intestinal lining |
| proglottid | continuously formed, detachable section of a tapeworm that contains male and female reproductive organs, flame cells, muscles, and nerves; breaks off when its eggs are fertilized and passes out of the host's intenstine |
| hydro-static skeleton | the pseudocoelom in roundworms; the fluid within a closed space that gives rigid support for muscles to work against |
| trichinosis | disease caused by eating raw or undercooked meat, usually pork, infected with Trichinella larvae |
| mantle | membrane that surrounds a mollusks's internal organs |
| radula | rasping tonguelike organ with rows of teeth that many mollusks use in feeding |
| gill | respiratory structure of most aquatic organisms, taking many forms |
| open circulatory system | blood is pumped out of vessels into open spaces surrounding body organs |
| closed circulatory system | blood is confined to the vessels as it moves through the body |
| nephiridium | invertebrate structure used to eliminate metabolic wastes from cellular processes |
| suphon | tubular organ that pumps water over the gills of most mollusks; can be used for locomotion if water is expelled forcefully |
| crop | sac in which food and soil are stored until they pass to the gizzard; found in earthworms and birds |
| gizzard | muscular sac in earthworms and birds that contains hard particles that help grind soil and food before they pass into the intestine |
| seta | tiny bristle that digs into soil and anchors an earthworm as it moves forward |
| clitellum | thickened band of segments that produce a cocoon from which young earthworms hatch |
Created by:
dave_7x
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