Which type of body cell continues to regenerate throughout a person's life?

Labile cells are the type of body cells that continue to regenerate throughout a person's life. This category includes cells that are regularly and continuously dividing, such as those found in the lining of the gastrointestinal tract, skin, and bone marrow. These cells are constantly being replaced due to their exposure to wear and tear or damage, making their regenerative ability critical for maintaining tissue integrity and overall health.

In contrast, stable cells, which are typically quiescent but can regenerate when stimulated, have a slower turnover rate and do not divide continuously under normal circumstances. Permanent cells, on the other hand, are terminally differentiated and do not have the ability to regenerate; examples include neurons and cardiac muscle cells. Fixed cells are generally associated with specific functions in tissues but do not involve ongoing regeneration like labile cells. Thus, the regenerative capacity of labile cells is fundamental for healing and maintaining the function of various tissues throughout life.