The major immune cell types derive from stem cells located in the

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The bone marrow is the primary site of hematopoiesis, which is the process of blood cell formation. Stem cells located in the bone marrow give rise to various types of immune cells including B cells, T cells, natural killer cells, and others. The other options, such as lymph nodes, thymus gland, and liver, play important roles in the immune system, but they are not the primary site of immune cell production.

The Major Immune Cell Types Derive from Stem Cells Located