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
WBCs are categorized into two main groups based on their appearance: (which contain small sacs) and agranulocytes . white cell
Vital for targeted immunity; B-cells produce antibodies, while T-cells manage immune responses and destroy infected cells. White blood cells (WBCs), or , are the
The rarest type, which helps prevent blood clots and triggers inflammatory responses during allergies. Histology, White Blood Cell - StatPearls - NCBI Bookshelf Types and Functions WBCs are categorized into two
Large cells that migrate into tissues to become macrophages, which "eat" dead cells and pathogens.
Specialize in fighting parasitic infections and are heavily involved in allergic reactions.
The most abundant type (55-70%), serving as the "first responders" to bacterial infections.
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