Animal kingdom-invertebrates
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Transcript Animal kingdom-invertebrates
The Animal Kingdom
Simple Invertebrates
From Sponges to Echinoderms
Invertebrate
Animal without a backbone.
Major Phyla
Sponges (Porifera)
Coelenterates
Flatworms
Roundworms
Segmented Worms (Annelids)
Mollusks
Echinoderms
Sponges (Porifera)
Bath Sponge
Elephant’s Ear
Sponge
Venus’s Flower
Basket
Sponge Characteristics
Live in water
Attach to objects
Hollow body with opening at top
Water flows through pores into body
Cells with flagella filter food from
water
Wastes flow out opening at top
Coelenterates
Hydra
Jellyfish
Coral
Sea Anemone
Coelenterate Characteristics
Live in water
Sometimes attached
Sometimes floating
Armlike tentacles with stinging cells catch
food & push through opening
Waste flows out of same opening
Flatworms
Planaria
Tapeworm
Fluke
Flatworm Characteristics
Some Free-living
Some parasites, live in and on other
organisms
Definite head & tail end
Food and wastes pass through same
opening
Roundworms
Trichina
Pinworm
Hookworm
Roundworm Characteristics
Some free-living
Some Parasites
Smooth body
Food enters mouth
Wastes leave body through anus at other
end of digestive system
Segmented Worms (Annelids)
Earthworm
Sandworm
Leech
Segmented Worm Characteristics
Body developed into ringlike segments
Well developed digestive, circulatory, and
nervous systems
Mollusks
Clam
Scallop
Snail
Squid
Octopus
Mollusk Characteristics
Well-developed body systems
Many have shells
Move with muscular foot
Echinoderms
Starfish
Sea Urchin
Sand Dollar
Echinoderm Characteristics
Spines stick out from inside skeleton
Move with tube feet
Food & wastes pass through same opening
Complex Invertebrates
The Arthropods
Arthropods
Means jointed legs
Have bodies in 2 or more parts
Body covered with a tough exoskeleton
Exoskeleton splits & is skaken off as
animal grows – called molting
New exoskeleton grows to take place
of the old one
Classes of Arthropods
Insects
Arachnids
Crustaceans
Chilopoda (centipedes)
Diplopoda (millipedes)
Insects
Grasshopper
Ant
Mosquito
Termite
Butterfly
Bee
Moth
Housefly
Insect Characteristics
Three main body parts: head, thorax
(middle region), and abdomen (lower
region).
Three pairs of legs
One pair of feelers or antennae
Most have wings
Some are social - live together & divide
work
Arachnids
Spider
Mite
Tick
Scorpion
Arachnid Characteristics
Two body parts: head & thorax-abdomen
Four pairs of legs
No antennae
Spinnerets of spiders produce silk to make
webs for catching prey
Crustaceans
Crab
Lobster
Shrimp
Barnacle
Water Flea
Crustacean Characteristics
Two body parts: head & thorax-abdomen
Five pairs of walking legs plus swimmerets
for swimming
Two pairs of antennae
Live in water
Chilopoda (centipedes)
House Centipede
Field Centipede
Chilopoda Characteristics
Wormlike body made up of many
segments
One pair of legs on each segment
Claws on first segment give off poison that
paralyzes prey
Diplopoda
Common Millipede
Spotted-Snake
Millipede
Diplopoda Characteristics
Wormlike body with many segments
Two pairs of legs on each segment
Roll up in a ball when disturbed