GENERAL KNOWLEDGE

Detailed explanation-1: -In children, haematopoiesis occurs in the marrow of the long bones such as the femur and tibia. In adults, it occurs mainly in the pelvis, cranium, vertebrae, and sternum.

Detailed explanation-2: -Bone Marrow Structure and Function Hematopoiesis, or the production of the formed blood elements, occurs in the bone marrow. However, in the adult, it is largely restricted to scattered clusters of hematopoietic cells in the proximal epiphyses of the long bones, skull, vertebrae, pelvis, ribs, and sternum.

Detailed explanation-3: -In adults, hematopoiesis of red blood cells and platelets occurs primarily in the bone marrow. In infants and children, it may also continue in the spleen and liver. The lymph system, particularly the spleen, lymph nodes, and thymus, produces a type of white blood cell called lymphocytes.