What organic substances is the cell membrane made of? What organisms is this cell structure characteristic of?

What organic substances is the cell membrane made of? What organisms is this cell structure characteristic of? How is the cell membrane different from the plasma membrane?

The basis of the cell membrane is the plasma membrane (outer cell membrane, plasmolemma) – a biological membrane that limits the internal contents of the cell from the external environment.
All biological membranes are a double layer of lipids, the hydrophobic ends of which are turned inward, and the hydrophilic heads are detected. In addition to lipids, proteins are part of the membrane. This cellular structure is characteristic of animals and humans. In plants, cell membranes are covered with cellulose cell wall.

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