PATHOLOGY

Detailed explanation-1: -In humans, hematopoiesis begins in the yolk sac and transitions into the liver temporarily before finally establishing definitive hematopoiesis in the bone marrow and thymus. Experiments with human embryos confirm observations in the hemangioblast, a common precursor for endothelial and hematopoietic cells.

Detailed explanation-2: -Summary. Adult hematopoietic tissue is located in the flat bones and the ends of the long bones. Hematopoiesis occurs within the spongy trabeculae of the bone adjacent to vascular sinuses.