The frog heart and human heart are similar in that there are two atria. Each atrium brings in either oxygen rich or oxygen deprived blood from the body, pumping it to the ventricle(s). The difference...
The heart has four chambers: two atria at the top and two ventricles at the bottom.
Blood from the body enters the heart through the veins. It moves from the veins into the atria.
The atria...
The heart contracts and expands due to it's muscles. The blood is made to go one way only, by the use of Valves between each chamber. Blood circulates through the heart in arteries and veins. They...
As i have just learned the heart receives oxygen rich after creating a loop with the lungs .The blood is never entering the frog though because it is always in the frog.
The pure blood after circulation leaves the heart and enters into the aorta or the aortic arch. Then from here it circulates in the whole body for the exchange of materials.
The impure blood, coming...