3.Subcutaneous tissue: composed of a large number of adipose tissue and loose connective tissue, its thickness varies greatly with age, sex, location and nutritional status. Subcutaneous tissue contains arteries, veins, lymphatic vessels, hepatic glands, nerves and deep hair follicles. Its main function is to prevent heat dissipation, store fat, resist external mechanical shocks, while maintaining skin tension, plump body shape. Women's subcutaneous fat is more than men's, so that the skin is more smooth and round, with the order. People envy the beauty of curves.