LAYERS OF THE SKIN DERMIS PRACTICE EXAM QUESTIONS AND ANSWERS.

dermis contains: -collagen fibers and elastic fibers -blood vessels, nerves, and glands dermis cell types: fibroblasts, macrophages, adipocytes layers of the dermis (superficial to deep) papillary and reticular papillary layer -areolar connective tissue -elastic fibers and fine collagen fibers -dermal papillae located here -1/5 of dermis -superficial layer reticular layer - dense irregular connective tissue - collagen fibers and elastic fibers -4/5 of dermis (thicker) -deepest layer Collagen and Elastic fibers give skin strength, extensibility and elasticity Dermal Blood supply: papillary plexus and cutaneous plexus blood supply function regulate body temp -sends blood to skin plexus network, blood supply through dermis papillary plexus -supply blood to capillary loop that follows boundary of epidermis - in papillary region of dermis cutaneous plexus -boundary between reticular layer and hypodermis - hypodermis also called "subcutaneous" layer