Which of the following functions does not belong to lymphocytes?

Lymphocytes are a type of white blood cell that play a crucial role in the immune system. Their primary functions include producing antibodies, regulating the immune response, and identifying and destroying pathogens.

Producing antibodies is a key function of B lymphocytes, which help to neutralize and mark pathogens for destruction. Regulating immune response involves T lymphocytes, which can activate other immune cells and help orchestrate the body's response to infections. Identifying and destroying pathogens is primarily carried out by cytotoxic T cells and natural killer cells, which can directly attack infected or cancerous cells.

The transfer of oxygen is a function associated with red blood cells (erythrocytes), not lymphocytes. These cells contain hemoglobin, which binds to oxygen in the lungs and releases it to tissues throughout the body. Since lymphocytes are not involved in this transport mechanism, it is clear that this function does not belong to them.