Invertebrates

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Invertebrates Ashlee Malouf 7th Grade
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Table of Contents
Characteristics of Animals What is an
Invertebrate? Sponges Cnidarians Round and
Flat Worms Annelid
More Table of Contents
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Table of Contents Continued
Mollusks Arthropods Echinoderms Symmetry Quiz
Question 1 Quiz Question 2
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Hi! I am Wally the Worm and I am your Guide! I
will introduce you to the Wonderful World of
Invertebrates! Please press ONLY the space bar to
get through the presentation unless I tell you to
click something with your mouse! Lets get started!
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What makes an animal an animal?
There are 5 main characteristics 1.Animals are
many-celled organisms Have different kinds
of cells Digestive and Reproductive
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What makes an animal an animal?
There are 5 main characteristics 2. Have
eukaryotic cells These cells have a
nucleus Organelles surrounded by membrane
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What makes an animal an animal?
There are 5 main characteristics 3. Cannot
make their food Some eat plants Some
eat other animals Some eat both
I just eat plants!
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What makes an animal an animal?
There are 5 main characteristics 4. Digest
their food Particles are broken down
Cells use them
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What makes an animal an animal?
There are 5 main characteristics 5. Move from
place to place Find food, shelter, and
mates
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What do you think about animals?
When you think of animals you probably think
of Dogs Cats Bears
But I am an animal too!
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Dogs, Cats, and Bears
These are vertebrates. They have backbones or
spines. They only make up 5 of the Animal
Population
I am in the other 95!
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What is in the other 95?
Invertebrates! Thats what I am!
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What is an Invertebrate?

• An animal without a boney backbone
• They are divided into different groups
• Sponges
• Cnidarians
• Roundworms and Flatworms

I am an Invertebrate! Click on a group or click
the button for more!
More Groups
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Sponges
Cant make their own food Filter feeders Protect
bodies with spicules Made of spongin
Click on the Back button to go back to the Group
page
Back to Groups
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Cnidarians
Have tentacles surrounding their mouth Shoot out
stinging cells Hollow-bodied Body forms Polyp
and Medusa
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page
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Roundworms and Flatworms
Search for food Most are Parasites Feed off of
humans and other animals Asexual
I might look like these but I dont fit in here!
Back to Groups
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What is an Invertebrate?

• An animal without a boney backbone
• They are divided into different groups
• Annelids
• Mollusks
• Arthropods
• Echinoderms

I am an Invertebrate! Click on a group or click
the button to move on.
Move on
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Annelids
Segmented bodies Closed circulatory
system Complete digestive system, two
openings Examples
Earthworms, Leeches, Marine Worms
This is me!! Click the button to go back to Group
page.
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Mollusks
Usually have a shell Two-opening digestive
system Mantle- Thin layer of tissue secretes
the shell Have a foot for anchoring
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page
Back to Groups
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Arthropods
Over 1 million species discovered Arthro
jointed Pod foot Have an Exoskeleton Examples
are Insects, Spiders, Centi/Millipedes, Crabs,
Lobsters
Click on Exoskeleton to learn more or click the
back button to go back to the Groups page.
Back to Groups
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Echinoderms
Echino spiny Derm skin Internal skeleton
supports and protects Dont have brains Have a
Water-Vascular System
Click on Water-Vascular to learn more or click
the button for more Echinoderms.
More Echinoderms
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Echinoderms

Examples are Star fish, brittle stars, sea
urchins, sand dollars
Click the back button to go back to Groups.
Back to Groups
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Where do they live?
Anywhere and Everywhere

• Oceans
• Trees
• Underground
• In your backyard

Have you ever seen a worm like me anywhere?
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What percentage of the animal kingdom are
Invertebrates?

• 50
• 95
• 5
• 35

Use your mouse to click on the correct answer
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Sorry, that is not the correct answer! Click on
the button for a review.
Lets review the information
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Review
Remember that Invertebrates make up 95 of the
animal population! Vertebrates only make up 5.
Click on me to try again!
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That is Correct!! Way to go!! Click on the
button to move on!
Lets move on!
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Symmetry
There are three kinds of symmetry in Invertebrates

• Radial
• Asymmetrical
• Bilateral

Click on a type of symmetry to learn more!
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Bilateral Symmetry
Can be divided into equal halves Usually one line
of symmetry Halves are mirror images
This is the most popular type of symmetry among
Invertebrates. This is where I fit in! Click on
the button to move on or click on me to go back
to symmetry!
Learn more!
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Radial Symmetry
Multiple lines of symmetry Lines of symmetry
start from center and go out Like bicycle wheel
spokes These lines form identical segments of the
animal
Those arent like me! Click on the button to
learn more about symmetry.
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Asymmetrical Symmetry
There are no lines of symmetry This means there
is not a way to divide them into equal parts
Did you know that corals and sponges were
animals? Click on the button to go back to
symmetry.
Back to Symmetry
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Exoskeleton
Rigid body covering Protects and supports the
body Doesnt grow with animal Molting- Process of
shedding the Exoskeleton
Click the back button to go back to the Groups
page. Click me to go back to Arthropods.
Back to Groups
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Water-Vascular System
Network of water-filled canals Thousands of tube
feet Tube feet used for suction Also used to open
prey
Click the back button to go back to Echinoderms.
Back to Echinoderms
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What is an example of an Echinoderm?

• Lady Bug
• Earthworm
• Star fish
• Centipede

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That is Correct!! Way to go!! Click on the
button to move on!
Lets move on!
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Sorry, that is not the correct answer! Click on
the button for a review.
Lets Review the info!
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Review of Echinoderms
Echino spiny Derm skin Have tube
feet Help them move Help them attach
themselves Have radial symmetry
Click on radial symmetry for a review or click
the back button to return to the question.
Back to Question
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Congratulations! You are now an Invertebrate
Expert! Thanks for joining me today!
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Sources
Animal Cell picture www.enchantedlearning.com In
formation Glencoe Science Texas Science Grade
7 textbook Other pictures Microsoft Clip Art