Red blood cells are the most common blood cells, they travel suspended in the blood plasma. Red blood cells are biconcave, this means that they are shaped like a flat disc with a dimple on each side.The role of red blood cells is to carry oxygen in the blood to the muscles.
They Make up 45% of our blood.
Plasma is a straw-coloured liquid that makes up around 54% of our blood and carries all of the different types of cell contained in the blood.
It delivers nutrients to the body and helps to transport energy. Plasma also transports carbon dioxide, produced as a waste product by cells in the body tissues, this carbon dioxide is transported to the lungsand removed from the body
White Blood Cells defend the body against infection from microorganisms and can be found in less than 1% of our blood. There are two different types of white blood cell; each type does a slightly different job. Both types are found in the blood plasma.