Which is a function of the dermis?

Which is a function of the dermis?

• A. Provides blood supply for epidermis, sensory receptors, anchors epidermis in place, highly vascular
• B. Produces keratin for hair and nails
• C. Stores adipose tissue as energy reserve
• D. Produces hematopoietic tissue

Answer: (A)

The dermis supports the skin by its rich blood supply, by housing sensory receptors, and by anchoring the epidermis in place through its connective tissue, making it highly vascular and capable of nourishing the outer layer. Since the epidermis itself has no blood vessels, nutrients and oxygen diffuse from the dermal capillaries to keep it alive. Keratin production for hair and nails happens in the epidermis, not the dermis. Adipose tissue storage is primarily in the hypodermis (subcutaneous layer) beneath the dermis. Hematopoietic tissue is produced in bone marrow.

The dermis supports the skin by its rich blood supply, by housing sensory receptors, and by anchoring the epidermis in place through its connective tissue, making it highly vascular and capable of nourishing the outer layer. Since the epidermis itself has no blood vessels, nutrients and oxygen diffuse from the dermal capillaries to keep it alive. Keratin production for hair and nails happens in the epidermis, not the dermis. Adipose tissue storage is primarily in the hypodermis (subcutaneous layer) beneath the dermis. Hematopoietic tissue is produced in bone marrow.