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Multiple Choice
Which of the following is the most superficial layer of the epidermis?
A
Stratum spinosum
B
Stratum granulosum
C
Stratum corneum
D
Stratum basale
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1
Understand the structure of the epidermis, which is composed of five layers arranged from deepest to most superficial: Stratum basale, Stratum spinosum, Stratum granulosum, Stratum lucidum (only in thick skin), and Stratum corneum.
Recognize that the term 'superficial' refers to the outermost layer of the skin, which is exposed to the external environment.
Recall the function of the Stratum corneum, which is the most superficial layer. It consists of dead, flattened keratinized cells that provide a protective barrier against environmental damage and water loss.
Compare the listed options: Stratum basale (deepest layer), Stratum spinosum (second layer), Stratum granulosum (third layer), and Stratum corneum (outermost layer). Identify that Stratum corneum is the correct answer based on its position.
Conclude that the Stratum corneum is the most superficial layer of the epidermis, as it is the outermost layer directly exposed to the environment.