Multiple Choice
Which layer of the epidermis consists of up to 30 layers of dead cells?
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5. Integumentary System
The Epidermis: Layers
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Which layer is absent in the epidermis of thin skin?
A
Stratum corneum
B
Stratum spinosum
C
Stratum lucidum
D
Stratum basale
Verified step by step guidance1
Understand the structure of the epidermis, which consists of five layers in thick skin: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum. Thin skin lacks one of these layers.
Recall that the stratum lucidum is a translucent layer found only in thick skin, such as the palms of the hands and soles of the feet. It is absent in thin skin.
Review the functions of the stratum lucidum, which include providing an additional barrier to protect against friction and shear forces in areas of high mechanical stress.
Compare the layers of thin skin and thick skin. Thin skin contains the stratum basale, stratum spinosum, stratum granulosum, and stratum corneum, but lacks the stratum lucidum.
Conclude that the stratum lucidum is the layer absent in the epidermis of thin skin, as it is specific to thick skin regions.
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