What does the term "blast" in cellular biology indicate?

In cellular biology, the term "blast" is used to refer specifically to an immature or precursor cell that has the potential to develop into a more specialized cell type. These cells are often involved in processes like growth, differentiation, and regeneration. For example, in hematopoiesis, multiple types of "blast" cells can give rise to various blood cells such as lymphocytes or erythrocytes.

The usage of "blast" denotes not only immaturity but also a high degree of metabolic activity and a crucial role in development or healing. This distinguishes them from mature, specialized, or inactive cells. Understanding this terminology is essential in various biological and medical contexts, including tissue development and immune responses.