it doesn't
The heart is merely a highly specialized muscle that pushes blood around
So why does it break when you lose a loved one, or lose a love, or can't find love... etc.![]()

oh, and btw, research has indicated that some neuro-chemicalss that make one feel sad can get into the blood.. and interact in the intestines.. causing 'gut feelings'
And you do know that folks die of broken hearts don't you?
Depends on what you're referring to...[/QUOTE]
Jb, I am as unreligious as you are. When I speak to the heart, I speak to something that can't be identified scientifically. You do know I don't literally mean heart as in the muscle, don't you?
My daughters father died suddenly. His mother who was the mother of five, healthy, no physical problems, could lift the couch to vacuum. Died a weak to the day he did. Yep one week later. She had a strong heart. She was physically fit. Hell she was only 53. But he was her favorite, her baby. His death broke, destroyed her heart. So much so, that one week later she died in her sleep. Leave it to stress as that would be logical, personally I would leave it to love, because she loved him so much.