ohmic_region

Hi, recently I have been trying to find out regarding resistance of water at high voltages. I may seem oddly obsessed with this but it is forming a big part of a science project I am doing revolving around electrical safety with water and wet things, using detailed resistance values to back...

Can anyone explain to me how to understand the ohmic region of a MOSFET from its datasheet, or any formula to calculate the ohmic region according to the MOSFET datasheet, let's say IRFZ44n vs IRF3710, which one has a bigger ohmic region and how to analyze them accordingly? I am not an expert...