Which layer of the skin has no blood vessels or connective tissue?

Which layer of the skin has no blood vessels or connective tissue?

• A. Dermis
• B. Epidermis
• C. Hypodermis
• D. Subcutaneous tissue

Answer: (B)

The epidermis is avascular and lacks connective tissue. It sits on the living dermis, which supplies nutrients and oxygen via blood vessels that diffusion brings up into the epidermal layers. The epidermis is made of keratinocytes in several strata and does not contain blood vessels or connective tissue, whereas the dermis is rich in connective tissue and blood vessels, and the hypodermis beneath contains adipose tissue with larger vessels. So the layer with no blood vessels or connective tissue is the epidermis.

The epidermis is avascular and lacks connective tissue. It sits on the living dermis, which supplies nutrients and oxygen via blood vessels that diffusion brings up into the epidermal layers. The epidermis is made of keratinocytes in several strata and does not contain blood vessels or connective tissue, whereas the dermis is rich in connective tissue and blood vessels, and the hypodermis beneath contains adipose tissue with larger vessels. So the layer with no blood vessels or connective tissue is the epidermis.