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Perched on the exterior of our delicate, intricate bodies, the skin is our largest and fastest-growing organ, weighing nine kilograms and covering two square metres. We see it, touch it and live in it every day. It’s a habitat for a mesmerisingly complex world of micro-organisms. Its physical functions are vital to our health and indeed our survival, and it’s crucial to our sense of identity. Yet how much do we really know about it?

Through the lenses of science, sociology and history, Dr Monty Lyman leads us on a journey through the comedy, tragedy and exquisite humanity of our most underrated and overlooked organ. By delving into something that seems so familiar, he reveals how the skin is far stranger and much more complex than we’ve ever imagined.

In today’s episode, Dr Monty Lyman describes the form and function of the layers of the skin, and its vital role as a protective barrier. We learn about the causes of eczema, the efficacy of spa water, and the operation of the body’s immune system.

Written by Dr Monty Lyman
Abridged by Libby Spurrier
Read by Gunnar Cauthery.
Producer: David Blount
A Pier production for ´óÏó´«Ã½ Radio 4