| A | B |
|---|
| stratum basale | deepest layer of epidermis which produces new skin cells |
| stratum spinosum | gives skin strength and flexibility |
| stratum granulosum | contains a lipid-rich secretion that acts as a water-repellant sealant |
| stratum lucidum | contains large amounts of keratin and is located only in the thick skin of the soles, fingertips, palms, and soles. |
| stratum corneum | outermost layer which protects the underneath layers |
| cuticle | narrow band of epidermis that occupies the proximal border of the nail |
| free edge | portion of the nail that extends beyond the tip of the digit |
| lanula | white crescent-shaped area of the nail |
| nail body | portion of the nail that is visible |
| nail root | portion of the nail covered by skin |
