What is the cellular composition of human blood?
One milliliter of healthy human blood consists of cell types in approximately the following numbers:
- Leucocytes (function: immune response) 4–7 x 106 cells
- Thrombocytes (function: wound closing) 3–4 x 108 cells
- Erythrocytes (function O2 and CO2 transport) 5 x 109 cells