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Transcript
SPONGES
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Simplest animals
Soft bodies made of “spongin”
Live in the ocean
No body organs
Ex: deep sea sponge, luffa
sponge
JELLYFISH FAMILY
 Soft bodies that float or attach
to bottom
 Tentacles with stinging cells
 Mouth underneath body
 Ex: sea nettle, Portuguese
man-o-war, coral, sea
anemone
WORMS
 Long, thin bodies
 No shell or skeleton
 Can be flat, round, or have
segments
 Can be free living or can be
parasites
 ex: tapeworm, nematodes,
earthworm
MOLLUSKS
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Soft bodies
Live in water or on land
Can have a muscular “foot”
Some have shells (snail,
oyster, clam)
 Some have no shell (slug,
octopus, squid)
SPINY SKIN ANIMAL
(echinoderm)
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thick, sandpapery skin
5 arms, or multiples of 5
suction cups under arms
Mouth on the bottom
Tongue like sandpaper
ex: starfish, sea urchin
INSECTS
 Arthropods (jointed legs)
 3 body parts:
head, thorax, abdomen
 1 pair of antennae
 6 legs
 some have 2 pairs of wings
 ex: bees, ants, butterflies,
beetles, grasshoppers
ARACHNIDS
 Arthropods (jointed legs)
 2 body sections:
Cephalothorax and abdomen
 8 legs
 mouth parts: fangs, sucking
 ex: spiders, ticks, scorpions,
mites
CENTIPEDES
 Many body segments
 1 pair of legs on each
segment
 (look like they have 100 legs)
 1 pair of long antennae
 Predators – run fast to catch
prey
MILLIPEDES
 Many body segments
 2 pairs of legs on each
segment
 (look like they have 1000
legs)
 1 pair of small antennae
 Herbivores (eat plants)
 Curl up when scared
CRUSTACEANS
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Arthropods (jointed legs)
Live in water (except for woodlice)
Hard shell
2 pairs of antennae
10 total legs; can have
pincers
 ex: shrimp, crabs, lobsters