| A | B |
|---|
| acoelomate | an animal without any body cavities |
| pharynx | the tubelike muscular organ that can extend out of the mouth and suck food particles into the digestive tract |
| flame cell | a cilia-lined, bulblike cell that moves water and certain substances into excretory tubules for elimination from the body |
| ganglion | group of nerve cell bodies that coordinates incoming and outgoing nerve impluses |
| 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; breaks off when its eggs are fertilized and passes out of the host’s intestine |
| cilia | short, numerous projections that look like hairs |
| hydrostatic 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 |
