Phospholipids are used more for a structural role in building up the cell membranes and the membranes that surround the cell act as a barrier to the outside world.
The fatty acids in a triglyceride molecule are organic acids with a carboxyl group or "COOH" group on one end and that end is joined to a hydrocarbon tail.
The total glycerol molecule is represented on the left, and three individual fatty acids, also known as carboxylic acids, are represented on the right.
In order to break three bonds in a triglyceride, three molecules of water are needed, as three oxygen atoms and six hydrogen atoms are added to the triglyceride.
Hydrolysis can be broken down into two parts: lysis means to break, and hydro means water, indicating that water is needed to break these things apart.
The process of breaking down triglycerides into glycerol and three fatty acids requires the input of three molecules of water and it breaks three ester bonds.