Middle layer of skin - Dermis
The dermis is the layer of skin that lies beneath the epidermis and above the subcutaneous layer. It is the thickest layer of the skin, and is made up of fibrous and elastic tissue. Thus it provides strength and flexibility to the skin. The dermis is comprised of two layers: the papillary dermis and the reticular dermis. The papillary dermis is the more superficial of the two, and lies just beneath the epidermal junction. It is relatively thin and is made up of loose connective tissue, which includes: Capillaries Elastic fibers Reticular fibers Collagen The reticular dermis is the deeper and thicker layer of the dermis, which lies above the subcutaneous layer of the skin. It contains dense connective tissue, which includes: Blood vessels Elastic fibers (interlaced) Collagen fibers (in parallel layers) Fibroblasts Mast cells Nerve endings Lymphatics