What is the outer layer of skin?

What is the outer layer of skin?

• A. Epidermis
• B. Dermis
• C. Hypodermis
• D. Sebaceous

Answer: (A)

The outermost layer of skin is the epidermis. It’s a protective, keratinized layer made of stratified squamous epithelial cells. The epidermis is avascular, so it relies on blood vessels in the underlying dermis for nutrients. Its outer region, the stratum corneum, consists of dead, keratin-filled cells that form a tough, waterproof barrier to prevent water loss and block pathogens. Beneath the epidermis lies the dermis, which provides strength and houses blood vessels, nerves, hair follicles, and glands. The hypodermis (subcutaneous tissue) sits below the dermis and contains fat for insulation and energy storage. Sebaceous glands are oil-producing glands located within the dermis, not a skin layer themselves.

The outermost layer of skin is the epidermis. It’s a protective, keratinized layer made of stratified squamous epithelial cells. The epidermis is avascular, so it relies on blood vessels in the underlying dermis for nutrients. Its outer region, the stratum corneum, consists of dead, keratin-filled cells that form a tough, waterproof barrier to prevent water loss and block pathogens. Beneath the epidermis lies the dermis, which provides strength and houses blood vessels, nerves, hair follicles, and glands. The hypodermis (subcutaneous tissue) sits below the dermis and contains fat for insulation and energy storage. Sebaceous glands are oil-producing glands located within the dermis, not a skin layer themselves.