You are dissecting a "mystery animal" in biology lab and discover that it has a series of closed blood vessels, a pair of lungs, two atria, and a single ventricle. what animal are you dissecting?
I would say that the animal you are dissecting is a frog. The internal's of a frog contains a pair of lungs, two atria, and a single ventricle. Hope this answers the question. Have a nice day. Feel free to ask more questions.
