The figure below illustrates which of the following imaging planes? 
Definitions:
Heart Valves
Structures within the heart that open and close to control the flow of blood through the heart's chambers and into the arteries.
Aorta
Originating from the heart's left ventricle and stretching to the abdomen, it is the body's biggest artery, responsible for delivering oxygen-rich blood to the circulatory system.
Right Ventricle
A chamber of the heart that pumps deoxygenated blood to the lungs for oxygenation via the pulmonary artery.
Ventricular Contraction
The phase of the cardiac cycle in which the ventricles of the heart contract, pumping blood out of the chambers.
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