Invertebrates
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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. Invertebrate. S PONGEBOB H EARS W EIRD M USIC A T S QUIDWARD’S. Definitions.

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Invertebrates

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Invertebrates

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


Invertebrate

Invertebrate

  • SPONGEBOB

  • HEARS

  • WEIRD

  • MUSIC

  • AT

  • SQUIDWARD’S


Definitions

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


Sponges

Simplest invertebrate

Pores

No nervous system

No complex organs

Live in water

Can regenerate

Uses:

Uses:

Washing

Painting

Examples:

Freestanding

Encrusting

Sponges


Hollow bodied

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

Hollow-Bodied

  • Examples:

  • Sea Anemone

  • Jellyfish

  • Coral

  • Uses:

  • Jewelry

  • Decoration


Worms

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

Uses:

Fishing

Good for Soil

Examples:

Earthworm

Tapeworm

Planarian

Roundworm

Worms


Mollusks

Uses:

Food

Decoration

Examples:

Mussels

Oysters

Clams

Snails

Octopus

Squid

Invertebrates with soft bodies

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

Mollusks


Arthropods

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

Arthropods


Spiny skinned

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

Spiny-Skinned


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