Lipids is the main element and the main source of energy storage in the cell membrane.
Any of a wide range of organic substances that are classified together as lipids because they do not significantly interact with water, such as fats, oils, hormones, and some membrane components. The adipose cells, which act as an organism's energy storage depot and thermal insulator, sequester one form of lipid, the triglycerides, as fat. Some lipids, like steroid hormones, transmit messages between biochemical systems inside a single cell whereas others act as chemical messengers between cells, tissues, and organs. Organelles (structures within cells) and cell membranes are tiny thin structures made of two layers of phospholipid molecules.
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