How come a tree will explode when struck by lightning, but a human can withstand the shock

I know when lightning hits a tree the water turns to gas blowing the tree apart, but why not a human being?

Actually, a person hit by lightning will probably suffer severe effects, ranging from nerve damage, to skin and internal burns, to death. If the electrical current travels through the heart, the chances of dying are very high. Very few people have survived a direct hit by lightning, and even fewer still have survived several such hits! In fact, a human doesn't even need to be in direct contact with the electricity, if the electromagnetic pulse, (EMP), from a nearby lightning bolt occurs at a certain point in the heart's cycle, it will cause the heart to "freeze" resulting in death! (It's this EMP that causes a loud "POP" in your AM radio and a flash of light on your TV when a lightning bolt hits nearby.)

If a tree is hit by lightning before it gets well soaked by rain, it is likely that the sap in the tree will carry the current, heat up and explode. If the tree is hit by lightning after the tree is well soaked by rain, chances are that the rain water will take most of the current and the tree will be undamaged.

That's because wood is electricity-conductive