________ are the simplest lipids but they may be a part of or a source of many complex lipids.

The building blocks of fat in our bodies and the food we eat are called fatty acids.
The body converts lipids into fatty acids during digestion so that they can be taken into the circulation.
A molecule known as a triglyceride is created when three fatty acid molecules are linked together.
Carboxylic acids joined to alkyl chains are fatty acids.
In mammalian systems, the typical fatty acids are unbranched and may contain one or more double bonds.
They are cis double bonds.
Fatty acids with branched chains and those with aliphatic ring structures are well known.
The number of carbon atoms and carbon-carbon double bonds in the chain are used to designate fatty acids.
A unique class of fatty acids are called essential fatty acids.
They are referred to as such since humans cannot make them on our own and must obtain them from diet.
Linoleic acid and alpha-linolenic acid (ALA), which are found in plant oils, are examples of important fatty acids.

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