The function of heart?

You ever wonder, what's the function of your heart?
According to this site: http://www.sads.org.uk/heart_function.htm
The heart is a specialised muscle that contracts regularly and continuously, pumping blood to the body and the lungs. The pumping action is caused by a flow of electricity through the heart that repeats itself in a cycle. If this electrical activity is disrupted - for example by a disturbance in the heart's rhythm known as an 'arrhythmia' - it can affect the heart's ability to pump properly.

mmm.. and this morning.. when i was reading Mark 7... I was reminded of another function of the heart...
Mark 17: 18 So He said to them, “Are you thus without understanding also? Do you not perceive that whatever enters a man from outside cannot defile him, 19 because it does not enter his heart but his stomach, and is eliminated, thus purifying all foods?”[g] 20 And He said, “What comes out of a man, that defiles a man. 21 For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, 22 thefts, covetousness, wickedness, deceit, lewdness, an evil eye, blasphemy, pride, foolishness. 23 All these evil things come from within and defile a man.”

No wonder it is stressed in proverbs...
"Above all else, guard your heart for it is the wellspring of life. Let your eyes look straight ahead; fix your gaze directly before you. Make level paths for your feet and take only ways that are firm. Do not swerve to the right or the left; keep your foot from evil." - Proverbs 4:23-27

:) Guard your heart.... beware.... for it is not only another muscle... but, it is the wellspring of life.... do not let it be polluted... :)