What are the functions of RBC …

Function of RBC
The main function of Red blood Cells (R B C) are to carry oxygen to all parts of the body and to bring carbon dioxide to the lungs. The haemoglobin in the red blood cell is the carrier for oxygen and carbon dioxide. So, for the transportation of oxygen and Carbon dioxide, adequate number of matured and functioning red blood cells must be available. RBC must also contain appropriate amount of haemoglobin.
Function of WBC:
(WBC) are chiefly responsible for fighting infection by identifying, engulfing, and destroying foreign organisms . They are active in the immune response by producing antibodies to foreign organisms.
Function of Platetets:
platelets plays a key role in the haemostatic reactions that prevent bleeding after minimal injury to blood vessels.   Without an adequate number of  functioning platelets, an individual would bleed to death.