Which cells are primarily involved in phagocytosis?

Phagocytosis is a critical immune response where specific cells engulf and digest pathogens, debris, and foreign substances. The primary cells involved in this process are granulocytes, which include neutrophils and eosinophils. These cells are adept at identifying and ingesting pathogens, thus playing a crucial role in the body's defense mechanism.

Neutrophils, a type of granulocyte, are often the first responders to sites of infection and are particularly efficient in phagocytosing bacteria. Eosinophils, while primarily associated with combating parasitic infections and mediating allergic responses, also contribute to phagocytosis to some extent.

Other cell types mentioned in the options, such as red blood cells, do not engage in phagocytosis; their primary function is to transport oxygen and carbon dioxide. Basophils play a role in inflammatory responses and allergic reactions but are not directly involved in phagocytosis. T cells are pivotal in the adaptive immune response, particularly in recognizing and responding to specific antigens, but they do not perform phagocytosis as their main function.

Thus, granulocytes are the cells specifically designed for the phagocytic process, making this the correct choice for the question regarding which cells are primarily involved