01 DEFINITION Cellular elements of the blood- RBC Cellular components occupies 40- 45% of the blood and are of three types: Red blood cell (erythrocyte) White blood cell (leukocytes) Blood platelet (thrombocytes) Cellular component- Red blood cell (erythrocyte) Production Bone marrow Structure Small, biconcave, disc like structure, nucleus absent Size 7 micron diameter Lifespan 120 days Death Approx. 2,00,00,000 RBC per minute RBC count Male: 5 million RBCs Female: 4- 5 million RBCs Major component Haemoglobin Major function Oxygen carrier Abnormality Excessive RBC count- Polycythaemia Abnormally low RBC count- Erythropenia 02 DEFINITION Structure of RBC The shape of a red blood cell is a biconcave disk, it has a sunken centre on both sides, this allows the cell to have a larger cell membrane surface which can be exposed to diffusing oxygen while it is travelling to the lungs. The structure also enables the cells to be more flexible ...
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