the Right side
the left side of the heart
is the body
The right atrium and ventricle of the heart, as well as veins, contain oxygen-poor blood. The left atrium and ventricle, as well as the arteries, contain oxygen-rich blood. One exception to this is the pulmonary vein and artery, which are reversed - pulmonary artery contains oxygen-poor blood and pulmonary vein contains oxygen-rich blood.
Arteries carry oxygen-poor blood from the heart; veins carry oxygen-poor blood back to the heart.
In the leopard frog heart, the right atrium carries oxygen poor blood and the left atrium carries oxygen rich blood.
Oxygen-poor blood enters the heart through the right atrium
Arteries carry oxygen-poor blood from the heart; veins carry oxygen-poor blood back to the heart.
Systemic veins, not to be confused with pulmonary veins, carry oxygen poor blood back to the heart.
The right side of the heart pumps oxygen-poor blood into the lungs for oxygenation.
The right atrium and ventricle transport blood to the lungs. This blood is oxygen-poor and needs to be replenished. The blood returns to the heart into the left atrium and ventricle. This blood is oxygen-rich, and the heart transports it to the rest of the body.
Blood entering the left ventricle is rich in oxygen. In contrast, oxygen-poor blood enters the right ventricle.
The division between the right and left heart is called the interventricular septum, which separates the two ventricles. This septum ensures that oxygen-poor blood on the right side of the heart does not mix with oxygen-rich blood on the left side.