Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Lesson one-Animals without backbones

An animal without a backbone invertebrate
A simple invertebrate that has a hollow body with a single opening and lives in water sponge
An invertebrate with armlike parts and stinging cells on the ends of tentacles cnidarian
An invertebrate that has a soft body and a shell mollusk
A spiny-skinned invertebrate echinoderm
An internal supporting structure endoskeleton
An invertebrate with jointed legs, a body that is divided into sections and an exoskeleton arthropod
A hard covering that protects the bodies of some invertebrates exoskeleton
Broken up into 3 groups: flat, round and segmented worms
The largest group of invertebrates arthropods
The simplest kind of worm flatworm
has a thin body with pointed ends roundworm
a worm with a segmented body segmented worm
the simplest kind of invertebrate sponge
Created by: EtonAcademy