The most intimate layer of skin
Saan Nesstron skin series on paper, Newburgh, NY, 2021
Our integumentary system (skin) has been called a membrane but it's also a system.
I think our skin receives emotional factors too.
Our skin protects us from microbes, permits the sensations of touch, heat, or cold, and helps regulate body temperature.
All these different actions are roots for emotions and psychological changes.