There are infinity blood cells in our body but if you are asking about platelets then they vary from age and person to person
The average adult has about 8-10 pints of blood in his or her body.
Forty two (42) vials of blood may be drawn at one time.
how many leters of blood does anormal person have
One
At least twelve.
5 liters of blood
A blood transfusion
the transferring of blood from one person to another
Twice, but one pint of blood is generated every month. Don't push donation without proper diet.
Many people have drowned in their own blood following an accident which resulted in the lungs being punctured and filling with blood. If emergency medical treatment is not performed immediately, the person can drown in their own blood very quickly, similar to one drowning in water.
Yes you are right, every person in the world is responsible to each and every thing. Blood donating is also one of the responsibility of a person, that by giving blood you can save one live.
When a person donates blood, many tests are run on that blood, B12 is not one of those, so yes, a person with a B12 deficiency may be able to donate. However, It would not be advisable to do so as it may exacerbate some symptoms this person may have such as tiredness and fatigue.