Question: what is the difference between a frog and human heart?
Answer: Frog's heart has two accessory chambers, Sinus Venosus for receiving blood from body and Conus Arteriosus for sending the blood out from heart. Human heart does not possess such chambers. ... Frog's heart has one ventricle, hence deoxygenated blood from body mixes with the oxygenated blood coming from lungs.