Which of the following white blood cells is the most abundant in the human body?

Neutrophils are the most abundant type of white blood cells in the human body, making up approximately 50-70% of the total leukocyte count. They play a crucial role in the immune system, primarily by responding quickly to infections, especially bacterial infections. Neutrophils are the first line of defense and are known for their ability to perform phagocytosis, where they engulf and digest pathogens. Their high abundance reflects their essential function in protecting the body against foreign invaders.

In contrast, other types of white blood cells serve different roles in the immune response but are less numerous. For example, lymphocytes are vital for adaptive immunity and typically comprise about 20-40% of white blood cells. Basophils and eosinophils are less common and are more associated with allergic reactions and parasitic infections, respectively, contributing only a small fraction of the leukocyte population.