If water is a polar molecule, how does it manage to get through the non-polar area of the lipid bilayer? (

The lipid bilayer, one of the major components of a cell membrane, is composed of fats that are arranged in order to carry out the barrier-like functions of the bilayer. The bilayer, which is composed of a hydrophobic area, which is called the polar head region, and a hydrophobic area, called the nonpolar tail region. Being highly impermeable, it does not allow molecules to freely pass across it; however, water and small gas molecules can easily pass through the bilayer. This is because water, although a polar molecule, has a relatively small molecular diameter which can easily pass through the spaces of the hydrophobic interior of the bilayer without the assistance of other structures of the cell membrane.

Size and shape of continents