Triglycerides Fatty acid esters of glycerol. ■Fats Solid at room temperature oMost are derived from mammals ■Oils Liquid at room temperature Most are derived from plants or cold-blooded animals.Triglycerides ◼Fatty acid esters of glycerol. ◼Fats ⚫Solid at room temperature ⚫Most are derived from mammals ◼Oils ⚫Liquid at room temperature ⚫Most are derived from plants or cold-blooded animals