The most abundant type (55-70%), serving as the "first responders" to bacterial infections.
WBCs are categorized into two main groups based on their appearance: (which contain small sacs) and agranulocytes . white cell
White blood cells (WBCs), or , are the primary defense units of the human immune system. Produced in the bone marrow, these cells circulate through the bloodstream and lymphatic tissues to identify and destroy foreign invaders like bacteria, viruses, and parasites. They typically make up only about 1% of total blood volume but are essential for survival. Types and Functions The most abundant type (55-70%), serving as the
Vital for targeted immunity; B-cells produce antibodies, while T-cells manage immune responses and destroy infected cells. The most abundant type (55-70%)