Final answer:
White blood cells are vital for the immune system, originating from hematopoietic stem cells and playing a crucial role in protecting the body against infections.
Explanation:
White blood cells, or leukocytes, are a crucial component of the body's immune system. They play a significant role in identifying and targeting pathogens, helping protect the body against infections.
These cells originate from hematopoietic stem cells in the bone marrow and are essential for fighting off foreign invaders and abnormal cells. Different types of white blood cells have specific immune functions, collectively working to maintain the body's defense mechanisms.
White blood cells circulate in the blood and lymphatic system, constantly on patrol to encounter and combat foreign entities that pose a threat to the body's well-being.
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