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Interesting Reference Values

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2 weeks to get from basal to granular cell layer

2 weeks more to cross stratum corneum and shed

 

6 months for avulsed nail to grow out

 

•normal CD4/CD8 ratio in blood = 1.8/1
•erythrocyte ~ 7µm diameter
•amount of cream to cover entire body surface of an adult once = 30g
•largest compound that will penetrate intact (non-inflamed) skin ~ 500d
•normal rate of  hair growth = 1cm per month
•epidermis – up to a depth of 60 to 100µm
•dermis – up to a depth of 2 to 5mm