Can someone help me understand Bernoulli's Equation?

[06mangro]

C=v^2/2+gz+ P/p

This is it... there is pressure P... and then kinteic energy per unit volume and potential energy per unit volume... adding all of these gives = conservation of energy...

Why is this?
(Might need to explain the conservation of energy)
Preferably a more wordy reply :) thanks

 

[voko]

Wikipedia has an excellent article on it.