Skin anatomy. Block cutaway artwork showing the anatomy of human skin, including two blocked pores (pimple, red; and blackhead, black) and two hairs (brown) on the surface. The skin layers include an outer layer of dead skin cells (stratum corneum, light brown), below which is the epidermis (red), below which is the dermis (thickest layer), with the hypodermis (subcutaneous tissue, yellow fat) at bottom. The dermis contains sebaceous glands (yellow), hair follicles (blue, base of hairs), sweat glands (brown spirals), blood vessels (red and blue), and Pacinian corpuscles (blue and green).