Are all lymphocytes considered leukocytes?

Lymphocytes are indeed a subtype of leukocytes, which are the broader category of white blood cells. Leukocytes play a crucial role in the immune system, protecting the body against infections and foreign invaders. There are several types of leukocytes, with lymphocytes being one of the most critical components due to their role in adaptive immunity.

Lymphocytes can be categorized into three main types: T-cells, B-cells, and natural killer (NK) cells. Each of these types has specific functions in the immune response. For instance, T-cells are vital for cell-mediated immunity, while B-cells are responsible for antibody production.

Understanding the relationship between lymphocytes and leukocytes is essential in immunology and medicine. Recognizing that all lymphocytes fall under the broader category of leukocytes helps to clarify their importance within the immune system and highlights their various functions in maintaining health.