Mononuclear phagocytes are produced by -: (A) Thymus, (B) Spleen, (C) Bone marrow, (D) Liver
Answer is C. The monocyte is formed in the bone marrow and transpoed by the blood ; it migrates into the tissues, where it transforms into a histiocyte or a macrophage. Reff: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg:137