Not sure what you mean by "witch label" but energy is released from ATP when one of the three phosphates is separated from the rest, converting ATP into ADP and releasing energy. I believe the process is just called ATP hydrolysis although there may be a term I'm unaware of.
Explanation:
citosol, hialoplasma o matriz citoplasmática
Endoplasmic Recticulum:
<span>a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis</span>
The LEFT VENTRICLE of the heart supplies oxygenated blood to the aorta.
Aorta is the main artery that supplies oxygenated blood from the heart to other organs and tissues (except lungs, lungs are for gas exchange instead) so that they get enough oxygen and nutrients.
Meanwhile, the heart has 4 chambers, left and right atrium, and left and right ventricles. Atrium are for receiving blood from different vessels, and ventricles are for pumping blood out of the heart.
Since only the left ventricle is connected to the aorta, so, the answer should be left ventricle.
Reference picture by amac training.