• qais
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See, heart has the function of pumping blood. It propel blood throughout the body.
When it propel blood from heart to lungs and back again, it is called pulmonary circulation and when it is from heart to all the other parts of body and back again, it is called systemic circulation. Here is nothing like heart to heart circulation.
Hope you understand, what i'm trying to say.
Actually my question is heart receives blood from coronary artery and the deoxygenatef blood from the heart is poured in right atrium by coronary sinus what is that circulation  called ?
There is nothing called like that
please be clear of what you ask
heart only pumps blood to all parts of the body