Here is The Hillâs look at who is most likely to claim the nomination next year. The race for the Republican presidential nomination is heating up, with the first GOP debate just three months away.
1 Circulation (journal), a journal published by the American Heart Association. 2  Library circulation, the activities around the lending of library books and other material to users of a lending library.  Magazine circulation, the average number of copies of a periodical distributed per edition/ volume.
The pulmonary circulation is a short loop from the heart to the lungs and back again, and the systemic circulation sends blood from the heart to all the other parts of our bodies and back again.The heart is the key organ in the circulatory system.