Emotions of the Heart

I was wondering the other day.

Why is it that we feel emotions like sadness and love concentrated at the heart? Why is it not that we feel those emotions in our brains or some other parts of the body?

Happiness is felt throughout the body. Anger is concentrated at our head. But I have felt that sadness and love is only felt at the heart. Why?

My friend and I were trying to come up with our own reasons.

Theory 1:

The brain sends signals to the heart in case of all emotions but the heart tells the brain it can't handle the signals when the emotions are that of sadness or love. Hence, we feel something tugging at our hearts. Why don't we feel other emotions intensify at the heart?

Theory 2:

Why does the brain have to send signals to the heart when any emotion is concerned? A heart does not have the capability to feel or respond to an emotion. So why send it to the heart?


I have been trying to find the answer to the above questions for a few days now. My friend could not come up with anything. Neither could I.

Why at the heart?