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.
How to Use Apple Cider Vinegar (ACV) For Weight Loss. If you are not used to the taste and effects of apple cider vinegar, you might want to include it into your diet gradually. Start by adding 1 teaspoon of apple cider vinegar to a cup of water and drink it once a day. Then, increase the amount of vinegar per serving, and the frequency of drinking. According to research on ACV and weight loss, you should consume a daily amount of 2 tablespoons of vinegar mixed with a cup of water.