PATHOLOGY

Detailed explanation-1: -Hematopoietic stem cells or hemocytoblast produce different types of blood cells called myeloid and lymphoid lines. Myeloid and lymphoid lines are involved in the formation of dendritic cells.

Detailed explanation-2: -Lymphocytes are mature, infection-fighting cells that develop from lymphoblasts, a type of blood stem cell in the bone marrow. Lymphocytes are the main cells that make up lymphoid tissue, a major part of the immune system. Lymphoid tissue is found in lymph nodes, the thymus gland, the spleen, the tonsils, and adenoids.

Detailed explanation-3: -Once thought to emerge from the yolk sac, hematopoietic stem cells have now been shown to originate from the embryonic aorta. Increasing evidence suggests that hematopoietic stem cells are produced from an endothelial intermediate designated by the authors as hemangioblast or hemogenic endothelium.