A rough analogy is when the oil in your car's engine is dirty and needs changing, it gets blackened, thick and sludgy. Thickened bile can't flow well. Since your intestines REQUIRE bile to stimulate movement, poor bile flow causes lack of peristalsis, which equals constipation.
A water molecule measure approximately 2.75 angstroms, making it one of the smallest of all molecules. One meter is 10 billion angstroms. The water molecule is shaped like a V, with two atoms of hydrogen extending at an angle of around 104 degrees from an atom of oxygen. Continue Reading.
Atoms have sizes on the order of 1-5  (1 angstrom = 1  = 1  10-10 m) and masses on the order of 1-300 amu. To put the mass and dimensions of an atom into perspective consider the following analogies. If an atom were the size of Ohio stadium, the nucleus would only be the size of a small marble.