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Where is the stratum lucidum layer found to be thickest?

  1. Palms of the hands and soles of the feet

  2. Around the elbows

  3. On the scalp

  4. Across the back

The correct answer is: Palms of the hands and soles of the feet

The stratum lucidum layer is found in the epidermis, the outermost layer of the skin. This layer is mostly found in thick, hairless areas of the body such as the palms of the hands and soles of the feet. This layer helps to protect the skin from friction and pressure. The other options, such as around the elbows, on the scalp, and across the back, do not typically have thick layers of stratum lucidum, as these areas have hair and are not subjected to as much friction and pressure as the palms and soles. Therefore, the thickest layer of stratum lucidum is found in the palms of the hands and soles of the feet.