Eccrine sweat glands are the more common type of sweat glands and they can be found everywhere but predominantly on palms and soles. They are composed of both simple and stratified cuboidal epithelial cells. These glands secrete sweat that contains a high quantity of electrolytes and other metabolites.
Sweat glands showing both simple and stratified cuboidal epithelium. (TM: 400x, picture taken with a Zeiss F40/0.65 on Sony A7ii)Another sweat gland specimen. (TM: 400x, picture taken with a Zeiss Planapo 40/1.0 oil on Sony A7ii)Reticular dermis of scalp, showing the difference between sweat and oil gland. Annotated version can be found here. (TM:100x, picture taken with Nikon Planapo 10/0.4 on Sony A7ii)
Kit Ng, Ph.D. 