White Blood Cells ) – their manufacture bone marrow, lymph nodes Happens in
- Their average life span is 1 to 4 days and that of Lymphocyts to years.
- The nucleus is found in these.
- Their shape is indeterminate (similar to amoeba) and they are larger in size than RBC (19 to 16 muμm thick).
- Their main function is to protect the body from microbes.
There are mainly 2 types of white blood cells
- granulocyte or granulocyte – Contains neutrophils (50–70%), eosinophils (3–5%), basophils (1–3%).
- agranulocyte and granuleless Lymphocytes (28-35%) and monocytes (5%).
- Neutrophils Their number is highest in WBC. Their main function is to feed on bacteria. These are called microphases.
- Eosinophils – Allergy, due to asthma and worm infection blood In this their number increases.
- basophils – This is the smallest (10 muμm) WBC and hemiparin, a substance secreted by mast cells, carries histamine.
- lymphocytes – This lifetime is for years Antibodies (antibodies). Which destroys them by interacting with foreign substances (antigens).
- monocytes – This is the biggest (16 muμm) is WBC. It also feeds on foreign substances like bacteria etc. to them macrophages Also called macrophages.
- WBC count ranges from 4000 to 11,000/ml of blood.
- Blood Cancer The number of white blood cells increases greatly. (1.5 lac/mm3 till).
- Their number increases even when there is an attack of an infectious disease (bacterium). But less than 1.5.