Intestinal villi, finger-like projections that line-up the small intestine. They increase the surface area available for the absorption of nutrients from digested food. Magnification: when printed 10 centimetres wide.
Langer's lines, also called cleavage lines, is a term used to define the direction within the human skin along which the skin has the least flexibility. These lines correspond to the alignment of collagen fibers within the dermis.
This brilliant gastric image comes just in time for lunch through much of the Western Hemisphere - mouse stomach section with mucous-secreting cells (red) along stomach lining & acid-producing cells (green & magenta).