Where are erythrocytes leukocytes and thrombocytes produced?

Erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets) are all produced in the bone marrow, a spongy tissue found in the center of certain bones. Hematopoietic stem cells in the bone marrow differentiate into these various blood cell types. Additionally, some leukocytes, such as lymphocytes, mature in lymphoid organs like the thymus and lymph nodes.