invertebrates Word Scramble
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Question | Answer |
cnidarians | invertebrates that have poison stingers on their tentacles; use them to capture prey |
mollusks | soft bodies; some live on land (snails/slugs) and some live in water (clams/oysters/squids); bilateral symmetry & many organ systems |
echinoderms | spiny skinned animals; star design & spiny skin (sand dollar/seastars/sea cucumbers/sea urchins) |
endoskeleton | internal structure with many protective spines; have tiny tube feet that grab things |
arthropods | largest of all invertebrate & animal phyla; live everywhere on Earth; have jointed legs & a body divided into sections; some have gills & others have open-tube breathing systems |
exoskeleton | hard skeleton on the outside of the body; protects & keeps arthropods from drying out; doesn't grow, but is shed by molting |
chitin | light, tough material that exoskeletons are made of |
molting | shedding of the exoskeleton |
invertebrates | animals without backbones |
sponges | shaped like a sack with an opening in the top; no symmetry, is hollow, & doesn't have bones; can grow back missing parts; has holes in it to filter food from water; adults don't move from place to place, but young sponges do |
flatworms | flat, ribbonlike bodies, with a head & tail; bilateral symmetry |
planaria | live in fresh water & eat food with a mouth |
parasites | live & feed inside the bodies of other animals; no mouth or digestive system; absorb food in their host's intestines |
roundworms | slender, rounded bodies with pointed ends; include ascaris, hookworms, and vinegar eels; have a one-way digestive system (food enters in one opening, but waste leaves through another) |
segmented worms | have bodies that are divided into sections; bilateral symmetry & digestive system with 2 openings (one for food to enter & one for waste to exit); earthworms |
earthworms | segmented worm with a head & tail; has bristles that help it move through the soil; complex organ systems (blood vessels, hearts, and nerves) |
arachnids | spiders, scorpions, ticks; 8 legs & up to 8 eyes; eat insects; spin webs to capture food |
crustaceans | crabs, lobsters, shrimp, barnacles, crayfish; antennae for sensing; 10 or fewer legs, including claws; sectioned body; use claws to fight & scare off predators |
centipedes | less than 100 legs; eat worms, slugs, insects |
millipedes | more than a 100 legs; eat plants; move slowly & legs move in a wavelike motion |
insects | beetles, flies, bees, ants, mosquitoes, butterflies, dragonflies; 1 pair of antennae; 6 legs, 2 wings, 3 body sections (head, thorax, legs); special tube for breathing & eyes made of hundreds of lenses; first insects lived about 350 million years ago |
Created by:
tjackat
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