What is the difference between RBC and WBC ?

RBC / Erythrocyte:

1. They are red in colour due to presence of haemoglobin.

2. They are smaller in size (7.5µ), biconcave and non-nucleated.

3. They are immobile.

4. They are produced in red bone marrow.

5. They transport oxygen and carbon dioxide.

WBC / Leucocyte:

1. They are colourless due to absence of haemoglobin.

2. They are larger in size (15µ) irregular and nucleated.

3. They leave the blood vessels and move to the injury site (diapedesis).

4. They are produced in lymph nodes, spleen, etc.

5. They defend the body from attack of germs.