1. Invertebrates
3.3.7.A Describe the similarities and differences that characterize diverse living things; describe how the structures of living things help them function in unique ways

2. Invertebrate
SPONGEBOB
HEARS
WEIRD
MUSIC AT
SQUIDWARD’S

3. Definitions Invertebrate – Animal without a backbone
Vertebrate – Animal with a backbone
Regenerate – Regrow missing part
Scavenger – Animal that eats dead animals
Parasite – Animal that lives inside and harms other animals
Molting – Shedding skin

4. Sponges Simplest invertebrate Pores No nervous system
No complex organs
Live in water
Can regenerate
Uses:
Uses:
Washing
Painting
Examples:
Freestanding
Encrusting

5. Hollow-Bodied Examples: Uses: Hollow center and one opening
Live in water
Look like plants
Attach to rocks
Some float or swim
One large opening or mouth
Mouth makes them more complex than sponges
Tentacles
stingers
Examples:
Sea Anemone
Jellyfish
Coral
Uses:
Jewelry
Decoration

6. Worms Uses: Examples: Fishing Soft bodies Good for Soil
Earthworm
Tapeworm
Planarian
Roundworm
Soft bodies
Three groups – flatworms, roundworms, segmented worms
Regenerate
Some live in water, some on land, some inside the bodies of other animals (called parasites)
Some are scavengers (eat dead animals)
Complex organs

7. Mollusks Uses: Examples: Invertebrates with soft bodies Food
Have shells
Shells provide protection
Some live in fresh or salt water
Some live in moist places on land
Special organs for moving, breathing, getting food, and pumping blood
Footlike part for moving, digging, and feeling
Uses:
Food
Decoration
Examples:
Mussels
Oysters
Clams
Snails
Octopus
Squid

8. Arthropods Uses: Examples:
Largest group of animals (75% of all animals)
Exoskeleton (outside skeleton for protection)
Live in water and on land
Some fly
Special body parts for special jobs
Molts
Jointed legs
Body sections, 3 or 4 pairs of legs
Bilateral Symmetry
Uses:
Food
Pets
Entertainment
Pest Control
Examples:
Lobster
Grasshopper
Spider
Tick

9. Spiny-Skinned Uses: Examples:
Sharp spines on the outside of their bodies. (Protection)
Tube Feet – Tiny, suctionlike cups used for moving, feeling and feeding.
Regenerate
Many characteristics of adult spiny-skinned animals are not as complex as arthropods, but young spiny-skinned animals are more complex than young arthropods.
Uses:
Food
Decoration
Collecting
Examples:
Sea Cucumber
Starfish
Sea Urchin
Sea Star
Sand Dollar