Abortion: Pro Choice or Pro Life?

By now you have realized that abortion is not a simple black-or-white issue. However, those in favor of abortion  (“pro-choice”) argue that the question of the morality of abortion rests on the question of whether a fetus is a person.

On the other hand, “pro-life” argue that abortion destroy a human life, and thus it is an immoral act.

First, explain the difference between a person and a human being. Why is this difference relevant in the discussion of abortion? Do you regard the human/person distinction relevant in the discussion or do you think there are more important factors to consider. Which ones?