Not exactly, they are the upper chambers of the heart, but inside, not "on top of".
Left atrium and right atrium.
right atrium and left atrium
Aorta tops the heart, but if you are looking for the elements of the heart itself that are situated higher but IN the heart, then it's left atrium and right atrium.
The upper two chambers of the heart are the right atrium or auricle, and the left atrium or auricle.
The two chambers on top of the heart are called the atria. There is a right atrium and a left atrium, which receive blood returning to the heart from the body and lungs, respectively. The right atrium collects deoxygenated blood from the body, while the left atrium receives oxygenated blood from the lungs.
Left atrium .
The Atria and Atrium
The sternum is anterior to the heart (in front of the heart). It may also be called superficial or ventral to the heart.
An atrium is in the heart, it is the top two chamber of the heart. the right atrium deals with deoxygenated blood from the body, whereas the left atrium deals with oxygenated blood from the lungs.
The right atrium is the structure of the heart that lies closest to the sternum. It is located at the top of the heart and receives deoxygenated blood from the body.
The right atrium is where the blood enters the heart.
There are four chambers in the heart: left atrium, right atrium, left ventricle and right ventricle. The left atrium is on the top left hand side of the heart where the vena cave and the pulmonary artery and joint to.