Cell differentiation refers to the process of cells changing their functional kind from one entity to another.
Cell differentiation in multicellular animals is regulated by a variety of factors, including environmental circumstances, cell signalling, and developmental stage.
When a sperm cell is fertilised with an egg, the fundamental differentiation occurs during the creation of the zygote. The zygote transfers the cells that require differentiation to accomplish specialised roles at this stage.
The fundamental benefit of cell differentiation is that cells become more specialised and efficient in performing specific functions. For example, to ease water transport via tracheary parts of the xylem, the cell loses its protoplasm and develops a lignified cell wall. Most mature erythrocytes RBCs in animals are devoid of a nucleus, allowing them to transport more oxygen via haemoglobin.