Classify the following reaction. 
Definitions:
Ejection Phase
This is the part of the cardiac cycle during which the ventricles contract and pump blood out into the arteries.
Left Ventricle
The heart's compartment that takes in blood rich in oxygen from the left atrium and then pushes it through the aorta to circulate around the body.
Pulmonary Trunk
A major blood vessel of the human heart that originates from the right ventricle and splits into the left and right pulmonary arteries, which transport deoxygenated blood to the lungs.
Right Ventricle
One of the four chambers of the heart, responsible for pumping deoxygenated blood to the lungs through the pulmonary artery.
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