為什麼心會在左邊?

大部份人心臟係左邊, 亦都有人係右邊.
之前都有人係知識+ 討論過右心症: http://hk.knowledge.yahoo.com/question/?qid=7006120100242
至於點解大部份人心臟係左邊, 我唸係本來左, 右心的人都有的, 只係右心既有多d病, 所以係人類進化中淘汰左, 所以而家左心既人多好多咁啫.

心係左面人既特徵
並沒特別用途及解釋

心係左面唔會有咩特別好處
因為有人係全部器官左右調轉黎生
即係心臟係右面
果d人同平常人一樣無分別
只係如果做手術會考起醫生

I would like to answer you in English.
I remember the words from my Biology teacher. He said actually, the human heart is located at the middle. But, um.... the pumping action of the heart is develop in the left side of the heart. So, the heart is liked located on the left. i hope i am correct.

因為神造人就是這樣！