In 30 Seconds
A cutaway of the skin's layers with sweat-gland distribution and secretion states — a foundational physiology diagram.
The Story Behind the Image
The skin is cut open lengthwise: layered structures laid out layer by layer, the distribution and secretion of sweat glands shown in contrast — the secretion system invisible to the naked eye becomes clearly legible in the section.
Scope note Year of creation not recorded.