Hi v gd answers so far - just to add a little detail for full marks:-
Fats in diet are mostly triglycerides i.e. they have three molecules of fatty acid attached to the 3 -OH groups of glycerol (glycerol is an alcohol - alcohols have an -OH group in organic chemistry.
The bond between each fatty acid and -OH of glycerol is an ester bond:
C=O-R
|
O - (rest of glycerol)
STRUCTURE OF GLYCEROL
CH2OH
|
CHOH
|
CH2OH
When digestion of fats begins, one ester bond may be broken to leave one fatty acid and a diglyceride (2 fatty acids still attached to 2 -OH groups of glycerol, respectively) AND one FFA (free fatty acid).
Next step leaves: a monoglyceride and another FFA.
FINALLY glycerol and a total of 3 FFAs.
Hope this adds to your knowledge.
Thanks,
M (Specialist biology tutor)