Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
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

Animals Lesson 1 - 4

Homeostasis Keeping internal body conditions stable
Adaptions Structures and behaviors that allow animals to perform their functions
Vertebrates an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Invertebrates an animal lacking a backbone
Tissue A group of similar cells that perform specific function
Organ a part of an organism that is made up of many tissues
Radial symmetry symmetry around a central axis, as in a starfish
Bilateral symmetry the property of being divisible into symmetrical halves on either side of a unique plane.
Cnidarians Invertebrates that have stinging cells and take food into the central body cavity
Sponges Asymmetrical invertebrates that have specialized cells but no tissues or organs
Mollusks Invertebrates with soft, unsegmented bodies that are often protected by a hard shell
Arthropods Invertebrates that have hard outer covering, segmented bodies, and pairs of jointed appendages
Exoskeleton The outer covering
Echinoderm Invertebrate that has an internal skeleton and a system of fluid-filled tubes
Endoskeleton And internal skeleton
Created by: KodaFabian