While walking barefoot in the woods, Joe stepped on a thorn that penetrated through the sole of his foot to the dermis. How many layers of epidermis did the thorn penetrate? A. 1 B. 2 C. 3 D. 4 E 5?

1 Answer
Apr 13, 2018

The answer is E. 5, because there are 5 layers of epidermis above the dermis.


The dermis is located just under the epidermis, but there are five layers in the epidermis:
1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum
5. Stratum corneum

This means that the thorn goes through 5 layers to reach the dermis.

(Note: The stratum lucidum layer is only found in certain areas where the skin is usually thick, as in the palms of your hands and soles of your feet.)