The blood supply to the dermis primarily comes from the subcutaneous/deep dermal supply, which then branches into the cutaneous plexus.
The dermis, the layer of skin beneath the epidermis, relies on a robust blood supply to maintain its health and function. This blood supply is organized into a network of vessels:
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Subcutaneous/Deep Dermal Supply: This is the main source of blood for the dermis. It consists of larger arteries and veins located deep within the skin, near the subcutaneous fat. These vessels branch upward into the dermis.
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Cutaneous Plexus: As the vessels from the deep dermal supply ascend, they form the cutaneous plexus. This is a network of interconnected blood vessels situated in the mid-dermis. The cutaneous plexus is crucial because it provides blood to the adnexal structures found within the dermis.
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Adnexal Structures: These structures include hair follicles, sebaceous glands (oil glands), and sweat glands. The cutaneous plexus ensures these structures receive the necessary oxygen and nutrients.
In summary, the blood supply to the dermis originates from the deep dermal vessels, which then feed the cutaneous plexus, supplying blood to the skin's adnexal structures.
