Create an account
member of the phylum Chordata; animal that has, for at least some stage of its life, a dorsal hollow nerve cord, a notochord, pharyngeal pouches, and a muscular tail
upper chamber of the heart that receives and holds blood that is about to enter the ventricle
lateral line system
sensitive receptor system that enables fish to detect gentle currents and vibrations in the water
term used to refer to animals whose young are born alive after developing in eggs inside the mother's body
term used to refer to animals that bear live young that are nourished directly by the mother's body as they develop
vertebrate that, with some exceptions, lives in water as a larva and on land as an adult, breathes with lungs as an adult, has moist skin that contains mucus glands, and lacks scales and claws
a muscular cavity at the end of the large intestine through which digestive wastes, urine, and eggs or sperm leave the body
movable transparent membrane in amphibians located inside the regular eyelid; protects the surface of the eye from damage under water and keeps it moist on land
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together