Question | Answer |
pharynx | in freeliving flatworms, the tube like muscular organ that can extend out of the mouth and such 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 outside the body |
ganglion | group of nerve-cell bodies that coordinates incoming and outgoing nerve impulses |
regeneration | 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 host's intestinal lining |
proglottid | continuously formed, detachable section of a tapeworm that contains male and female reproductive organs, flame cells, muscles, and nerves |
hydrostatic skeleton | the pseudocoelom in roundworms; the fluid within a closed space that gives rigid support for muscles to work agianst |
trichinosis | disease caused by eating raw or undercooked meat, usually pork, infected with trichinella larvae |
mantle | membrane that surrounds a mollusks internal organs |
radula | rasping tongue like organ with rows of teeth that many mollusks use in feeding. |
gill | respiratory structure of most mollusks and aquatic artropods |
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 |
nephridium | structure through which most mollusks eliminate metabolic wastes from cellular processes. |
siphon | tubular organ through which octopuses and squids eject water, at times so rapidly that their movement appears jet-propelled. |
crop | sac in which food and soil are stored until they pass to the earthworms gizzard |
gizzard | muscular sac in birds that contains hard particles that help grind soil and food before they pass into the intestines |
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 |