MICROANATOMY

Detailed explanation-1: -Final answer: The most active phagocytic white blood cells are neutrophils and monocytes.

Detailed explanation-2: –Neutrophils are phagocytes which ingest microorganisms or particles by the process called as antibody opsonization.-Thus, phagocytosis by neutrophils and monocytes is a key process in innate immune response. The most active phagocytes are Neutrophils and Monocytes.

Detailed explanation-3: -Answer and Explanation: The correct answer is D. The most active phagocytic cells found in circulating blood are neutrophils and monocytes. Neutrophils are the most abundant type of white blood cell in the blood.

Detailed explanation-4: -Neutrophils are the most phagocytic of these cells: they are the most abundant white blood cell, and can be identified by their granular cytoplasm and lobulated nuclei (usually 2-5 lobules). They are formed from myeloid stem cells found within bone marrow.

Detailed explanation-5: -Phagocytes such as neutrophils, monocytes, and macrophages are the major cells of innate immunity. They produce high amounts of reactive oxygen species (ROS) to kill phagocytized pathogens.