(*_*)cell membrane (*_*)

every cell is covered by a thin sheet of skin which is called cell membrane or plasma membrane Cytoplasm and nucleus are interclose within the cell membrane in other words cell membranes inter clauses the living parts of the cell called Pluto class the cell membrane protects the cell and also give shape to the cell cell membrane have tiny pores in it the cell membrane control the movement of substance into the cell and out of the cell that this solid substance which as such as food and oxygen are enter into the cellweathers the waste products such as a carbon dioxide can go out from the cell through the poles of the cell membrane

*Thanks ~

Introduction to Cell Membrane
The cell membrane, also known as the plasma membrane, is a vital structure that surrounds and protects the cell. It plays a crucial role in maintaining the integrity of the cell and regulating the movement of substances in and out.
Structure of Cell Membrane
- The cell membrane is primarily composed of a phospholipid bilayer.
- It contains proteins, cholesterol, and carbohydrates that contribute to its functionality.
- The phospholipid bilayer has hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward, creating a semi-permeable barrier.
Functions of Cell Membrane
- Protective Barrier: It acts as a barrier to protect the internal components of the cell from the external environment.
- Selective Permeability: The membrane controls the entry and exit of substances, allowing nutrients in and waste out.
- Communication: Membrane proteins act as receptors for signaling molecules, facilitating communication between cells.
- Transport Mechanisms: Various transport mechanisms like diffusion, active transport, and osmosis occur through the membrane, allowing cells to maintain homeostasis.
Importance of Cell Membrane
- The cell membrane is essential for maintaining the cell's shape and structure.
- It plays a significant role in cellular processes including metabolism, signaling, and interaction with other cells.
- Any damage to the cell membrane can lead to cell dysfunction and disease.
Understanding the cell membrane's structure and functions is fundamental in biology, as it is crucial for the survival and operation of all living cells.