What are the functions of blood cells in human beings? Explain
Answers
Blood cells are very useful for human beings.
There are three categories of blood cells
Red Blood Cells
Red blood cells are this shaped cells. They contain a red colour protein called haemoglobin. This hemoglobin combines with oxygen to form oxyhaemoglobin which helps in transporting oxygen throughout the whole body.
White Blood Cells
White blood cells are slightly larger than red blood cells. The main function of WBC is to defend the body is against infection hence these cells increase in number when a person suffer from some illness. They show amoeba like movement that help it to reach the site of infection through the wall of the blood vessels.
Platelets
Platelets are smaller than the red blood cells in the body. They have the blood to clot whenever there is wound on body. These blocks the flow of blood and prevent blood loss .