MICROANATOMY

Detailed explanation-1: -The hemocytoblast forms two types of descendants-the lymphoid stem cell, which produces lymphocytes, and the myeloid stem cell, which can produce all other classes of formed elements.

Detailed explanation-2: -An immature cell that can develop into all types of blood cells, including white blood cells, red blood cells, and platelets.

Detailed explanation-3: -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-4: -The developmental origin of hematopoietic stem cells has been for decades the subject of great interest. Once thought to emerge from the yolk sac, hematopoietic stem cells have now been shown to originate from the embryonic aorta.