IMMUNOLOGY

Detailed explanation-1: -White blood cells, also known as leukocytes, are responsible for protecting your body from infection. As part of your immune system, white blood cells circulate in your blood and respond to injury or illness.

Detailed explanation-2: -The name “white blood cell” derives from the physical appearance of a blood sample after centrifugation. White cells are found in the buffy coat, a thin, typically white layer of nucleated cells between the sedimented red blood cells and the blood plasma. The scientific term leukocyte directly reflects its description.

Detailed explanation-3: -Normal Results The normal number of WBCs in the blood is 4, 500 to 11, 000 WBCs per microliter (4.5 to 11.0 × 109/L).

Detailed explanation-4: -Leukocytosis is the broad term for an elevated white blood cell (WBC) count, typically above 11.0x10^9/L, on a peripheral blood smear collection. The exact value of WBC elevation can vary slightly between laboratories depending on their ‘upper limits of normal’ as identified by their reference ranges.