Blood plays a vital role in properly nourishing the body, maintaining acid-base balance, transporting hormones, and keeping salt and water levels in equilibrium. Blood ensures that body temperature remains balanced and at an ideal level for vital functions, and protects the body’s systems from external influences through the cells and fluid-based immune system it carries. Leukocytes—also known as white blood cells—are produced in the lymph nodes, spleen, and endocrine glands and form a crucial component of the immune system. To fully understand the function of leukocytes in the body, one must first have a clear understanding of what they are.
Leukocytes are known as white blood cells (WBCs). They are an important part of the immune system. They are a group of cells that protect the body against microbes. They multiply rapidly when the body is exposed to foreign substances. At certain times, they are described as the immune system’s defense mechanism. His primary function is to recognize and eliminate immunogens—such as bacteria, viruses, fungi, and toxic substances—that have entered the body in various ways. While performing this function, he, who is located within the vascular system, leaves the bloodstream to reach the relevant tissue where bacteria or viruses are present.
What Is the White Blood Cell Count? What Should It Be?
WBC levels are measured via blood tests across all age groups, but the expected normal ranges vary. In newborns, white blood cell counts are expected to range from 9,000 to 30,000 per microliter, while in children and adults, this range should be between 4,500 and 11,000. Here is a detailed breakdown of normal white blood cell levels:
0–1 month: 9.4–34.0 microliters
2–12 months: 5.0–19.5 microliters
Children aged 1–3 years: 6.0–17.5 microliters
Children aged 4–5 years: 5.5–15.5 microliters
Ages 6–15: 4.5–13.0 microliters
15 years and older: 4.5–11.0 microliters
The white blood cell (WBC) count in a person’s urine must be between 0 and 5 WBC/HPF. Regular checkups are necessary for a healthy life.
What Are the Types of Leukocytes?
Leukocytes, abbreviated as LEU, encompass five different types of WBCs, and each cell type has various functions;
Neutrophils: Abbreviated as NEU, these are the first cells to arrive at the site of foreign substances causing infections in the body. Neutrophils digest these foreign substances by releasing chemical enzymes to combat them.
Lymphocytes: Found in lymphoid tissue and the bone marrow, abbreviated as LYM, they are produced by the bone marrow. A portion remains in the site of production and matures into B cells, while the majority passes through the thymus—a lymph node located in the center of the chest—and matures into T cells. They secrete chemicals called lymphokines in response to foreign substances in the body, stimulating other immune system cells and enabling them to attack unrecognized substances.
Monocytes and Macrophages: They make up 8% of red blood cells. They enter the bloodstream following their production in the bone marrow. While in the bloodstream, these cells—referred to as monocytes—eventually leave the circulatory system and migrate to the tissues. Once there, these monocytes are called macrophages. They destroy microorganisms that cause infection and clear away dead cells.
Eosinophils: Abbreviated as EOS. They break down parasites that cause allergic reactions in the body and produce enzymes to destroy them.
Basophils: Basophils, which are the least abundant type of leukocyte in the body, fight infections and parasites. During allergic reactions, they release the chemical histamine, which triggers the body to produce antibodies.
What Is Elevated White Blood Cell Count in Urine?
Elevated white blood cell levels in urine are indicated by symptoms such as cloudy or foul-smelling urine, painful or frequent urination, fever, chills, and blood in the urine. While the presence of white blood cells in urine can indicate various conditions, treatment involves addressing the underlying infection. Consuming foods rich in vitamins B and C to strengthen the immune system helps reduce the level of leukocytes in the urine. The normal range for leukocytes in the first morning urine sample is 0–5 WBC/HPF.
What Is Low White Blood Cell Count?
Low white blood cell counts can result from various viral and bacterial infections, infections caused by parasites such as brucellosis transmitted through dairy products or malaria, infections associated with various fungi, anemia, liver disorders, autoimmune disorders, certain types of cancer, and side effects from medications. These conditions inhibit leukocyte production in the bone marrow, leading to low leukocyte levels in the blood. However, it is important for leukocyte levels to remain within the normal range so that the immune system can function properly.