Lymphocytes Role, Lymphocytes are a type of White blood cell and play an important role in the immune system. Lymphocytes are called Lymphocytes because they are the main cells in the lymph. Its life span is from a week to a few months and some live for years. Lymphocytes are made in bone marrow and travel to blood and lymph tissues.
Types of Lymphocyte
1. T-cells and Natural Killer cells:
- T-cells Destroy and attack cancer-infected cells and virus-infected cells of the body directly and control immune response.
- B-cells produce Antibodies against viruses, bacteria, and Toxins and start attacking them.
Structure of Lymphocyte
A lymphocyte is approximately the size of a red blood cell. The size is about 7 micrometers in diameter. Normal lymphocyte has a large, dark-staining nucleus.
Function of Lymphocyte
- Fight against viral infection
- Antibodies formation
- Direct killing of microorganisms
Normal Range of Lymphocytes in Blood
- 20-40 percent of all white blood cells in the bloodstream.
Terms used for High and Low Lymphocytes
- Lymphocytes if higher than the normal value (>40 %), are called Lymphocytosis.
- Lymphocyte if lower than the normal value (<20%) is called lymphocytopenia.
Causes of Lymphocytosis (High Lymphocytes)
- Acute Lymphocytic Leukemia
- Chronic Lymphocytic Leukemia
Lymphocytopenia Causes (Low Lymphocytes)
- Steroid use
- HIV and AIDS
- Radiation therapy
- Lymphocytic anemia
- Hodgkin disease
- Use of chemotherapy drugs