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.

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

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.

Remove ads
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


An endothermic vertebrate with a four-chambered heart, skin covered with fur or hair, and young fed with milk from the mother's body. Mammal
An organ in female mammals that produces milk for the mammal's young. Mammary Gland
A large muscle located at the bottom of a mammal's rib cage that functions in breathing. Diaphragm
A mammal that lays eggs. Monotreme
A mammal whose young are born alive at an early stage of development, and which usually continue to develop in a pouch on their mother's body. Marsupial
The length of time between fertilization and birth of a mammal. Gestation Period
A mammal that develops inside its mother's body until its body systems can function independently. Placental Mammal
A membrane that becomes the link between the developing embryo or fetus and the mother. Placenta
Created by: laurenwvu