Question

What are the phagocytic cells from the given diagram?

A. I and V
B. I and III
C. I and IV
D. I and II

Answer 1

Phagocytosis is a process that takes place when the cell tries to destroy the foreign particles or pathogens such as bacteria or an infected cell through the technique of engulfing it in lytic enzymes. This process is also seen in single-celled organisms such as amoeba during the ingestion of food particles.

Complete answer:
Phagocytosis is a process of engulfing various foreign particles or pathogens such as bacteria that are harmful to the human body and the cell involved in this process of phagocytosis is called phagocytes.
Phagocytosis has crucial importance to the immune system of the body and this process is started by special cells such as neutrophils and macrophages. Through the destruction of the pathogens, the immune system prevents the spread of infection or pathogens in the body. There are different phagocytic cells such as monocytes, macrophages, neutrophils, tissue dendritic cells, and mast cells.
In the above diagram, there are different kinds of white blood cells or leukocytes are projected. Among the figures, I represent monocyte cells, II represents lymphocyte cells, III represents eosinophil cells, IV represents basophil cells, and V represents neutrophil cells. As the monocytes and neutrophils are phagocytic cells, therefore from the given diagram I and V are the phagocytic cells.
Monocytes are a type of agranulocytes. These are actively motile and phagocytic cells. On the other hand, neutrophils are a type of granulocytes and these cells perform phagocytosis and destroy harmful bacteria entering the body.

Hence, the correct answer is option (A).

Additional information:
In the body of humans, phagocytic cells are those types of cells which provide protection to the human's body by ingesting or engulfing various harmful pathogens such as viruses, bacteria, and other infected/ dying cells. Phagocytic cells are essential for fighting against infections and subsequent immunity. In one litre of human blood, there are about six billion phagocytes present. These cells were first discovered in 1882 by Ilya Ilyich Mechnikov.

Note: Phagocytic cells are those cells that are involved in phagocytosis. These cells ingest various harmful foreign particles and pathogens in their lytic enzymes. Monocyte, neutrophils of the WBC are two examples of phagocytic cells. Here in the figure, I represent monocytes, and figure V represents neutrophils both of which are the phagocytic cells of the body.