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Secrets of Skin

Series 1

Protection

Duration: 28 minutes

on BBC Four HD

Available for years

Professor Ben Garrod reveals how skin protects vertebrates from extremes of temperature, the harmful effect of UV and a host of living organisms that want to get in. Show more

BBC Four HD

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.