Red blood cell Carry oxygen. Contain haemoglobin (rich in iron) to carry oxygen. Biconcave shape to provide a large surface area for the diffusion of oxygen. No nucleus to provide more space for ...

Healthy red blood cells have normal hemoglobin which is a ... escape the hassle of having sickle cell disease,” said Cross. Children impacted by the disease will sometimes be separated from ...

Red blood cells placed in a solution with the same water concentration as their cytoplasm (0.85 per cent salt solution) will not experience an overall change in volume. No osmosis occurs.