science
Terms
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- parasite
- animal or plant that lives in or on a host (another animal or plant)
- flatworms
- search for their food
- mollusks
- 3 body parts: head, foot, visceral mass
- mollusks
- soft body covered by hard shell
- cuticle
- the epidermis extended above a nail
- arthropods
- insecta, arachnids, crustaceans, myriapods
- echinoderms
- radially symmetrical
- echinoderms
- sea stars, brittle stars, sea cucumbers, sea urchins, sand dollars
- arthropods
- animals that have joined appendages
- arthropods
- What is the largest group of invertebrates
- segmented worms
- a group of worms with complex organ systems, a one-way digestive system, and bilateral symmetry
- molting
- shedding of the exoskelteon
- asymmetrical
- not of equal size or similar shape:
- mollusks
- soft-bodied invertebrates that usually have shells
- mollusks
- gastropod (one shell: live on land, snails, slugs, conch), bivalves (hinged shell in 2 parts: clams, scallops, oysters, marine and fresh water), cephalopods (no shell, "head-footed" live in ocean, swim, octopus, squid)
- worms
- flat, round, segmented
- radial symmetry
- no head or tail end, symmetrical all the way around
- sessile
- non moving
- sponges
- P Porifera
- endoderm
- innermost germ layer- forms the digestive tract
- cnidarian
- animals whose stinging cells are used to capture their prey and defend themselves, and who take their food into a hollow central cavity.
- echinoderms
- mouth, body, tube feet, nervous system (but no brain)
- echinoderms
- spiny-skinned invertebrates that live on the ocean bottom
- roundworms
- They are the first animal to form an anus and a mouth