MICROANATOMY

Detailed explanation-1: -This system includes the bone marrow, spleen, thymus, lymph nodes, and lymphatic vessels (a network of thin tubes that carry lymph and white blood cells).

Detailed explanation-2: -The lymphoid organs include the red bone marrow, thymus, spleen and clusters of lymph nodes (Fig 1). They have many functional roles in the body, most notably: Production of blood cells, including red blood cells (erythrocytes), white blood cells (leucocytes) and platelets (thrombocytes);