The organized sequence in which changes occur during regeneration is called development, wherein cells undergo specific transformations to generate different cell types and tissues.

Cells involved in regeneration contribute to the formation of various cell types and tissues by undergoing changes in an organized sequence referred to as development.

Specialized cells play a crucial role in regeneration by proliferating and producing large numbers of cells, contributing to the formation of new structures.

Regeneration is the ability of fully differentiated organisms to give rise to new individuals from their body parts. Hydra and Planaria can be cut into pieces, and each piece grows into a complete organism, exemplifying regeneration.

A specific cell type capable of reproduction in a multi-cellular organism must have the ability to grow, proliferate, and generate other cell types under appropriate conditions, ensuring the continuity of the organism’s life cycle.