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Knowledge in Small Appetize
Two layers of the skin (=cutis) are relatively sharply delimitable from each other, the external epidermis, also called episkin, and the underlying dermis (leather skin, korium).
The boundary between dermis and epidermis is not a flat surface, but the dermis sends stool-shaped bulges (=papillae) into the epidermis. Thus, the interface between the two layers can be greatly enlarged.
In the papillae of the dermis there are blood capillaries, which supply the epidermis with nutrients; the epidermis itself does not contain blood vessels.
The larger arteries and veins lie in the deeper layers of the dermis and in the subcutis.
Even if practice is the be-all and end-all of a treatment, we cannot do without theoretical knowledge! We use excellent textbooks and continue to train ourselves. The most important thing, however, is our contacts with doctors, biologists and engineers.
A special thank you goes to you.