Structure and Function of Arteries, Capillaries, and Veins. The walls of arteries and veins have three layers or tunics: 1  An outer layer (tunica adventitia) of connective tissue with collagen fibers. 2  A middle layer (tunica media) of circularly arranged smooth muscle and elastic fibers.
You might have heard that eating chocolate or greasy foods can cause acne, but these are both just myths. The truth is that food has little to do with breakouts. Acne occurs when the openings of hair follicles become blocked with oil secretions, dead skin cells and bacteria.
The sugar leads to inflammation. Therefore, too much sugar can cause an acne break out the next day. If youâre going to drink alcohol and donât want acne, youâre going to want to have alcoholic drinks that are filled with less sugar. This way, you can prevent and avoid acne scars and break outs in the future.