Difficulty: Medium
Average Score: 80%
Entry Exam
Passage / Scenario
Which of the following skin layers lacks blood vessels?
Correct answer
C
Rationale
The correct answer is C, Epidermis. The epidermis is the outermost layer of the skin and is avascular, lacking blood vessels. Nutrients are received through diffusion from the underlying dermis. In contrast, the hypodermis, dermis, and reticular papillary layers contain blood vessels that provide nutrients and oxygen to the skin. Understanding the avascular nature of the epidermis is crucial in grasping its functions and how it receives nourishment. Remember, the epidermis acts as a protective barrier and relies on the underlying layers for its blood supply.