Which epidermal layer above the stratum germinativum is present only in thick skin?

• A. Stratum Spinosum
• B. Stratum Granulosum
• C. Stratum Lucidum
• D. Stratum Corneum

Answer: (C)

In thick skin, there is an extra clear layer between the granulosum and the corneum called the stratum lucidum. This layer is made of flattened, dead keratinocytes rich in eleidin, giving a pale, translucent appearance. It helps provide an extra barrier where skin endures heavy wear, like on the palms and soles. Because this layer only exists in thick skin and is not present in thin skin, it’s the correct choice for identifying a layer above the stratum germinativum that appears only in thick skin. The other layers—spinosum, granulosum, and corneum—are found in both thick and thin skin, so they aren’t unique to thick skin.