Final answer:
Terminally differentiated cells such as neurons, skeletal muscles, and cardiac muscle cells do not divide once fully differentiated, unlike stem cells which continue to divide and differentiate. These specialized cells enter the G0 state and have varying lifespans before needing to be replaced.
Step-by-step explanation:
The type of cell that, when fully differentiated, does not divide to form new cells is known as a terminally differentiated cell.
This category includes cells such as neurons, skeletal muscle fibers, and cardiac muscle cells.
These cells enter a state referred to as G0 after their differentiation, where they no longer participate in the cell cycle. On the other hand, stem cells are unique because they retain the ability to divide and differentiate into various specialized cells, replenishing those that have a finite lifespan or have stopped dividing.