Question

Which of the following keep high oxygen and low oxygen blood from mixing in the frog's ventricle? A. The spongy irregular surface inside the heart B. The coordinated contractions of the atria C. A dividing wall to separate the ventricle into two equal halves D. A valve in the conus arteriosus

Answer 1

The correct answer is letter B. The coordinated contractions of the atria prevent the back flow of both oxygenated and unoxygenated blood into the ventricles of the frog's heart; much the same way as how the human heart functions and supplies the necessary blood supply within the body.