Red Blood Cells
- Contains Haemogobin.
- Do not have a nucleus
- Disc shape
Increases the surface area which inreases oxygen absorption.
- Thin membrane
Allows oxygen to diffuse easily in and out of the cell.
White Blood Cells
- They have a nucleus
- They have a cytoplasm
That has flowing movement, helps them sqeeze through cells in the blood capillary walls into tissues where they are able to engulf bacteria and viruses.
- Secrete digestive enzymes
Which destroys the bacteria and viruses.
- Small fragments of cells
- They do not have a nucleus
- They contain proteins
That enable them to stick to breaks in the blood vessel wall and also stick to each other.
A clot forms that stops the bleeding