Answer the following question given this paragraph: 

The Epidermis The epidermis is composed of keratinized, stratified squamous epithelium. It is made of four or five layers of epithelial cells, depending on its location in the body. It does not have any blood vessels within it (i. , it is avascular). Skin that has four layers of cells is referred to as “thin skin. ” From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, and stratum corneum. Most of the skin can be classified as thin skin. “Thick skin” is found only on the palms of the hands and the soles of the feet. It has a fifth layer, called the stratum lucidum, located between the stratum corneum and the stratum granulosum (Figure 5.3).


Q: The thick skin, found only on the palms of the hands and the soles of the feet, has an extra what?

 Choices:

- surface

- Skin

- outer

- layer

A:
layer
