* Glycerol: A three-carbon alcohol molecule.

* Fatty acids: Long chains of carbon atoms with hydrogen atoms attached.

How they form:

1. Three fatty acids attach to each glycerol molecule through ester bonds.

2. The resulting molecule is a triglyceride, the basic unit of fat.

Types of fatty acids:

* Saturated fatty acids: Have no double bonds between carbon atoms. They are typically solid at room temperature and found in animal fats and some plant oils.

* Unsaturated fatty acids: Have at least one double bond between carbon atoms. They are typically liquid at room temperature and found in plant oils.

In addition to triglycerides, fats also contain:

* Phospholipids: Similar to triglycerides but with one fatty acid replaced by a phosphate group. They are important components of cell membranes.

* Cholesterol: A steroid molecule found in animal fats. It is important for cell structure and hormone production.

It's important to note: Fat is an essential nutrient, providing energy and crucial for various bodily functions. However, consuming too much saturated fat can increase the risk of heart disease and other health problems.