Most of the fatty acids in cells contain an even number of carbons with 16 to 18 carbon atoms per molecule.
<h3>What are fatty acids?</h3>
Fatty acids are biomolecules which consist of a long non-polar hydrocarbon chain and a polar carboxylic acid head.
Fatty acid are found combined with glycerol molecules to form fats found in animals.
The oxidation of fatty acids produces large amount of energy for the body.
In conclusion. fatty acids are lipid molecules found in living organism that serve as energy stores.
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Answer: Excretory
Explanation: My grandpa went through this recently and I had to learn all about it. :(