||RBC stands for red blood cells.
||WBC stands for white blood cells.
||They are also known as erythrocytes.
||They are also known as leucocytes.
||They are small biconcave and non nucleated.
||They are comparatively larger, amoeboid and nucleated
||Much more in number.
||Much less in number.
||Around 5 million rbc’s per cubic mm of blood.
||Around 11000 wbc’s per cubic mm of blood.
||Red in colour due to the presence of haemoglobin.
||Non-pigmented and hence colourless.
||Life span is about 120 days.
||Life span is 5-21 days.
||Formed in bone marrow of vertebrae, ribs and pelvis.
||Formed in bone marrow, lymph gland, thymus, spleen.
||Are called oxygen carriers.
||Are called phagocytes.
||Carry oxygen from the lungs to the body tissues and help in respiration.
||Play an important role in body’s defence system by engulfing bacteria.
||No types are present.
||Various types are present.
|| Move only in blood vessels.
||Move in blood vessels and lymph vessels.
||Formation process called erythropoiesis.
||Formation process called leucopoiesis.
|| Form stacks or aggregation known as rouleaux.
||Do not form rouleaux.
||Decreased condition is called anaemia.
||Decreased condition is called leukopenia.
||Increased condition is called polycythemia.
||Increased condition is called leukocytosis and leukaemia.
||Accounted for 40-45% of total blood volume.
||Accounted for 1% of total blood volume.
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Differences between RBC and WBC