The reticular dermis is the thick deep layer of the dermis, made of dense irregular collagen and elastic fibres. It gives skin its strength and stretch and contains hair follicle roots, glands and larger vessels.
| Location | Between the papillary dermis above and the hypodermis below |
|---|---|
| Parts |
|
| Nerve Supply | Cutaneous nerves (sensory and sympathetic) |
| Blood Supply | Cutaneous branches of regional arteries (dermal and subpapillary plexuses) |
| Venous drainage |
|
| Lymphatic drainage |
|
Provides tensile strength, elasticity and support to the skin.
Burns reaching the reticular dermis heal slowly and scar, often needing skin grafts. Stretch marks form when collagen here tears during rapid growth, pregnancy or bodybuilding. Collagen loss here with age and sun damage causes wrinkles.
Linear scars from tearing of reticular dermis collagen under rapid stretch.
Burn into the reticular dermis that heals slowly with scarring.
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