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25 Cards in this Set
- Front
- Back
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mantle
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thin layer of tissue that covers the body organs
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mollusk
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soft bodied invertebrates that usually have a shell
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anterior
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front
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posterior
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back
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crop
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stores food here
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gizzard
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grinds the food
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satae
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bristle like structures used for movement
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arthropods
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invertebrates with jointed appendages
(insects, arachnids, cent/millpedes, crustaceans_ |
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metamorphosis
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an insect changes body form to become an adult
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echinoderms
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have hard exoskeltons covered with bumpy, spiny epidermis - lives in the ocean
have radial symmetry ex: starfish, sand dollars, sea urchins |
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molting
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shedding of exoskeleton
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exoskeleton
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hard, outer covering
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tube feet
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hollow, thin-walled tubes that each end in a suction cup
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Types of Symmetry/Definition/Examples
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Bilateral- (mollusks/soft bodies); mirror images/halves
Asymmetrical-(sponges); no symmetry Radial-(jellyfish); several pieces of symmetry |
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closed circulatory system
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blood containing food and oxygen move through body in closed vessels (ex: humans, cephalopods)
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open circulatory system
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the heart moves blood out into the open spaces around the body organs (ex: mollusks)
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gastropod
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largest group of mollusks
(snails, conchs, garden slugs) use radulas to eat |
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appendage
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jointed foot
(legs, antennae, claws and pinchers) |
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arachnids
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spiders, scorpions, mites, tics
Have two body regions: head/chest (cephalothorax) and abdomen |
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crustaceans
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crabs, crayfish, shrimp, barnacles
arthropod 1 or 2 pairs of antennae used for crushing food |
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cephalopod
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squid, octopus
"foot-headed" = large, developed head invertebrates |
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bivalve
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hinged, two-part shell joined by strong muscles
(in mollusks) |
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radula
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tongue-like organ with rows of teeth
uses to obtain food |
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Incomplete Metamorphosis
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3 stages: egg, nymph, adult
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Complete Metamorphosis
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4 stages: egg, larva, pupa, adult
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