Abstract
The theory of hematopoiesis has been in existence for many years, providing the foundation for understanding the blood system and its development, and adding to the basic principles in the study of human development. As we enter the new millennium, we are able to use this groundwork of the hematopoietic system to further our research endeavors. It has provided the medical arena with the capability to expand and enhance treatment options for patients, and to explore further the vast possibility this system has to offer us beyond the year 2000.