Veins hold the greatest volume of blood in the body--------and the heart along with the nerve glands in your throat.....
By a social fact, Durkheim is referring to facts, concepts, expectations that come not from individual responses and perferences, but that come from the social community which socializes each of its members.
One of Durkheim's first direct explorations of religion was the essay Concerning the Definition of Religious Phenomena (1897-1898). There he defined religious facts in terms of obligatory beliefs and the practices related to those beliefs.