Is the human heart bigger than the human brain?

if you are talking diametar metres the heart will be bigger but it really depends on what heart your talking about for example a mouses heart is smaller than a humans lung but a elephants heart is bigger than a humans lung. ants have very small lungs so if you put a human lung in a mouse it would most probaly die and vice versa as the mouse heart would never be a ble to keep a human alive. i think both the human heart and the human lung are ingenious things that should be eaten only on im a celebrity get me out of here. by chris lane