Why do we use the word heart for emotional purposes?

@puck61 I can't believe you actually think a link to a website that mentions the HeartMath Institute (which is not a research center, but another website) is enough to erase centuries of experiments and PRACTICAL research. Have you even seen a brain or a heart? Have you read any REAL books on neurology, cardiology, internal anatomy, physiology? Have you ever attended a basic human anatomy class? I'm always amazed at how people think that 5 minutes of a google search can make you an accurate doctor or scientist in general. There are people who've studies their whole lives in order just to conclude on what the hippocampus is and you think that a link to a website which mentions no names of real scientists and universities and research centers can do the job. My deep condolences.

@HannibalAteMeOut I've known that the heart has a brain for a long time. I don't know why you are so resistant to the idea.

@puck61 you aren't medical authority and I've read anatomy books, I've watched surgeries and I've seen a heart and a brain as well as other organs up close. You can't support your argument because you don't even know how to make a proper, valid syllogism. You're just dogmatizing and aren't offering proof. Anyone who has been to elementary school knows what a brain looks like and where it is.