Weight is a good guideline for blood volume in people of average build. This is why we set a minimum weight limit of 7st 12lbs (50 kg) because if more than 13% of blood volume is taken there is more risk of the donor feeling faint after donating.
Not surprisingly, the one factlet most often offered up as revealed truth is wholly false: Your hair and nails do not continue to grow after you die; it's all optical illusion. The sorry fact of the matter is that we dehydrate after dying. Our flesh dries and, in so doing, pulls away from nails and hair.
Since they can be also lost through injury and menstruation, the body constantly makes more. HAIR AGE: 3-6 YEARS. The age of your hair depends on how long it is, but it generally grows 1cm each month, explains hair restoration surgeon Dr Bessam Farjo. Each individual hair lasts up to six years in women and three years in men.