The frog has a three chambered heart, with one atrium and one ventricle.
A human heart has two atriums.
A mammal has a four chambered heart whereas a reptile has a three chambered heart. A mammal has 2 atriums and 2 ventricles when reptiles have 2 atriums, but only has one ventricle.
4; the right and left ventricles and the right and left atriums.
In most reptiles there are 2 atriums and 1 ventricle, it also has 3 heart chambers
Atriums
It is the door/opening between the ventricles and atriums.
A frog heart has only 1 ventricle, but 2 atria. Oxygen poor and oxygen rich blood mix and are pumped out to the body at the same time as to the lungs.
The upper heart valves are called atriums, and the lower heart valves are called ventricles.
The atriums push blood through the heart, and to the other chambers (specifically the ventricles).
4 2 ventricles and 2 atriums.
there are four chambers in the heart. two are atriums and two are ventricles
Heart