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How does cholesterol benefit the structural integrity of the animal cellular membrane? [Actually I added a...

How does cholesterol benefit the structural integrity of the animal cellular membrane? [Actually I added a bit of information here--animal cells have cholesterol while plant cells typically do not.

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Cholesterol is biosynthesized by all animal cells and is an essesntial structural component of animal cell membranes. Cholesterol interacts with the fatty acid tails of phospholipid to moderate the properties of the membrane. Cholesterol also serves as a precursor for the biosynthesis of steroid hormones, bile acid and vitamin D. Cholesterol is the principal sterol synthesized by all animals.

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