Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
![Plasma membrane
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Lysosome
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Mitochondria
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Rough endoplasmic reticulum
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Golgi apparatus
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Cellular warehouse and shipping area of proteins
Outer boundary of cells
Nuclear membrane
Non membranous, made up two subunits facilitates protein synthesis
Hydrolytic enzymes enclosed in a vesicle
Generates chemical energy of cells
Microtubule
Endomembrane system studded with ribosomes
Membrane containing the genetic material of the cell
Made up of tubulin subunits
Ribosome
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Plasma membrane - outer boundary of cells.
Lysosomes - hydrolytic enzymes enclosed in a vehicle.
Mitochondria - generates chemical energy of cells.
Rough endoplasmic reticulum - endomembrane system studded with ribosomes.
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