What separates the intracellular fluid from the extracellular fluid?

Cell Membrane

The intracellular fluid (ICF) and extracellular fluid (ECF) are separated by a semi- permeable cell membrane that is permeable to water but not to most solutes including electrolytes and proteins, which generally need transport systems to move across the membrane.

My pigs teeth have already came in years ago, with my first molars, and my second molars are pretty much in. my wisdom teeth will be unable to come in, but i'm getting those out on monday.