GS PrelimsScience and TechnologyHuman Health and Diseases2004

In which organ of the human body are the lymphocyte cells formed?

Liver

Long bone

Pancreas

Spleen

Correct Answer: Option B

Explanation

1 Lymphocyte cells, a type of white blood cell crucial for the immune system, originate from hematopoietic stem cells. 2 In the adult human body, hematopoiesis (the formation of blood cellular components) primarily occurs in the bone marrow. 3 Bone marrow is found within bones, particularly long bones and flat bones. 4 While lymphocytes mature in different locations (B cells in bone marrow, T cells in thymus) and function in organs like the Spleen and lymph nodes, their initial formation site from stem cells is the bone marrow.

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