Chapter 13 Test!

Appendages

Jointed structures of arthropods, such as legs, wings, or antennea

Arthropods

"Jointed foot" ;mostly insects and arachnids

Crop

Digestive sac in which earthworms store injested soil

Echinoderms

"Spiney skin" ;starfish, sea urchins, sand dollars, etc

Exoskeletons

thick, hard, outer covering that protects and supports arthropod bodies and provides places for muscles to attach

Gizzard

Muscular digestive system structure where earthworms grind soil and organic matter

Metamorphosis

Process where many insects change their body form to become adults; can be complete(egg, larvea, pupa, adult) or incomplete(eg, nymph, adult)

Molting

Shedding or replacing of an arthropod's exoskeleton

Radula

In gatropods, the toungelike organ with rows of teeth used to scrape and tear prey

Setae

Britslelike structures on the outside of each body segment that helps segmented worms move

Tube Feet

Hydraulic hollow, thin-walled tubes that end in suction cups and enable echinoderns to move