Layers of the Skin: Dermis

reticular layer

- dense irregular connective tissue - collagen fibers and elastic fibers -4/5 of dermis (thicker) -deepest layer

papillary layer

-areolar connective tissue -elastic fibers and fine collagen fibers -dermal papillae located here -1/5 of dermis -superficial layer

cutaneous plexus

-boundary between reticular layer and hypodermis - hypodermis also called "subcutaneous" layer

dermis contains:

-collagen fibers and elastic fibers -blood vessels, nerves, and glands

papillary plexus

-supply blood to capillary loop that follows boundary of epidermis - in papillary region of dermis

dermis cell types:

fibroblasts, macrophages, adipocytes

Collagen and Elastic fibers

give skin strength, extensibility and elasticity

plexus

network, blood supply through dermis

layers of the dermis (superficial to deep)

papillary and reticular

Dermal Blood supply:

papillary plexus and cutaneous plexus

blood supply function

regulate body temp -sends blood to skin