Solution:

• Haemoglobin, the protein inside red blood cells, carries oxygen.

• Red blood cells carry fresh oxygen throughout the body.

• Red blood cells are round with a flattish, indented centre, like doughnuts without a hole.

• It also removes carbon dioxide from your body, transporting it to the lungs for you to exhale.

• They are produced in the bone marrow, They typically survive for about 120 days, and then they die.

• Foods rich in iron help you maintain healthy red blood cells and Vitamins are also needed to build healthy red blood cells.