RBC and WBC are very important for our body. Everyone must have some basic knowledge about our blood

Red Blood Cells: The blood cells that carry oxygen. Red cells contain haemoglobin and it is the haemoglobin which permits them to transport oxygen (and carbon dioxide). Haemoglobin, aside from being a transport molecule, is a pigment. It gives the cells their red colour (and their name).

The abbreviation for red blood cells is RBCs. Red blood cells are sometimes simply called red cells. They are also called erythrocytes or, rarely today, red blood corpuscles.

White Blood Cells: White blood cells are vital components of the blood. Their role is to fight infection, and they are essential for health and well-being. A high white blood cell count may indicate that the immune system is working to destroy an infection. It may also be a sign of physical or emotional stress. People with particular blood cancers may also have high white blood cells counts.A low white blood cell count can signal that an injury or condition is destroying cells faster than they are being made, or that the body is producing too few of them.

              White blood cells make up around 1 per cent of all blood cells, and they are essential to regular function in the immune system. White blood cells are also known as leukocytes. The bone marrow continuously produces white blood cells. They are stored within the blood and lymphatic systems until they are necessary for fighting an infection or disease in the body.


          White blood cells are components of the blood that protect the body against disease and foreign invade. Several types of white blood cell serve different functions. Most people will produce around 100 billion white blood cells every day. There are normally between 4,000 and 11,000 cells in every microliter of blood, although this can vary according to race.

               There are several different types of white blood cells, each with varying responsibilities:

Lymphocytes: These are vital for producing antibodies that help the body to defend itself against bacteria, viruses, and other threats.

Neutrophils: These are powerful white blood cells that destroy bacteria and fungi.

Basophils: These alert the body to infections by secreting chemicals into the bloodstream, mostly to combat allergies.

Eosinophils: These are responsible for destroying parasites and cancer cells, and they are part of an allergic response

Monocytes: These are responsible for attacking and breaking down germs or bacteria that enter the body.

RBC’s are red in colour due to haemoglobin present in them

WBC’s are colourless as there is no pigment in them

RBC are produced in red bone marrow

WBC is produced mostly in the bone marrow. But they are also produced in lymph nodes, spleen etc.

RBC’s are smaller in size and rounded in shape.

WBC’s are larger in size and are of different shapes

RBC’s have an average life span of 120 days.

The lifespan of WBC’s vary according to their role. They have a lifespan from a few days to 3 weeks

Normal RBC count is 50-60 lakh RBC’s per cubic mm.of blood.

Normal WBC count is  5 thousand to 10 thousands per cubic mm of blood.Their function is to transport respiratory gases ( oxygen and carbon dioxide) .

Their main function is to produce antibodies and fight against the infections. Thus they are called soldiers of the body.

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