Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Bio II Chap 24 Vocab

Biology II Chapter 24 Vocabulary

TermDefinition
Invertabrate Animal without a backbone; between 95 and 99 percent of animal species are invertebrates.
Exoskeleton Hard/tough outer covering of many invertebrates that provides support, protects body tissues, prevents water loss, and protects the organism from predation.
Endoskeleton Internal skeleton that protects internal organs, provides support for the organism's body, and can provide an internal brace for muscles to pull against.
Vertebrate Animal with an endoskeleton and a backbone.
Hermaphrodite Animal that produces both sperm and eggs in its body, generally at different times.
Zygote Fertilized egg formed when a sperm cell penetrates an egg.
Internal Fertilization Type of fertilization that occurs when sperm and egg combine inside an animal's body.
External Fertilization Type of fertilization that occurs when sperm and egg combine outside an animal's body.
Blastula Fluid-filled ball of cells formed by mitotic cell division of the embryo.
Gastrula Two-cell-layer sac with an opening at one end that forms from the blastula during embryonic development.
Endoderm Inner layer of cells in the gastrula that develops into digestive organs and the digestive tract.
Ectoderm Outer layer of cells in the gastrula that develops into nervous tissue and skin.
Mesoderm Layer of cells between the endoderm and the ectoderm that can be become muscle tissue and tissue of the circulatory, respiratory, and excretory systems.
Symmetry Balance or similarity in body structures of organisms.
Radial Symmetry Body plan that can be divided along any plant, through a central axis, into roughly equal halves.
Bilateral Symmetry Body plan that can be divided into mirror images along only one plane through the central axis.
Anterior Head of an animal with bilateral symmetry.
Posterior Tail end of an animal with bilateral symmetry.
Cephalization Tendency to concentrate sensory organs and nervous tissue at an animal's anterior end.
Dorsal Backside of an animal with bilateral symmetry.
Ventral Underside or belly of an animal with bilateral symmetry.
Coelom Fluid-filled body cavity completely surrounded by mesoderm.
Pseudocoelom Fluid-filled body cavity between the mesoderm and the endoderm.
Acoelomate Animal with a solid body that lacks a fluid-filled body cavity between the gut and the body wall.
Protostome Coelomate animal whose mouth develops from the opening in the gastrula.
Deuterostome Coelomate animal whose anus develops from the opening in the gastrula.
Filter Feeder Organism that filters small particles from water to get its food.
Sessile Organism permanently attached to one place.
Cnidocytes Nematocyst-containing stinging cell on a cnidarian's tentacle.
Nematocyst Capsule whose threadlike tube contains poison and barbs and is discharged when prey touches a cnidarian.
Gastrovascular Cavity In cnidarians, the space surrounded by an inner cell layer, where digestion takes place.
Nerve Net Cnidarian nervous system that conducts impulses to and from all parts of the body.
Polyp Tube-shaped, sessile body form of cnidarians.
Medusa Umbrella shaped, free-swimming body form of cnidarians.
Created by: itscourtneym
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards