Final answer:
The cuticle is the outermost layer of keratinocytes in a hair shaft and plays a crucial role in hair health. When the cuticle is aligned in the same direction, it can result in smoother, shinier hair. This is often found in individuals with straight hair.
Step-by-step explanation:
The cuticle is the outermost layer of keratinocytes in a hair shaft. It is composed of very hard, keratinized cells that cover the cortex, which is the middle layer. The cuticle is responsible for protecting the hair and giving it its shine.
When the cuticle is "turned" in one direction, it means that the scales of the cuticle are all aligned in the same direction. This can result in smoother, shinier hair. Hair with the cuticle turned in one direction is often found in individuals with straight hair.
Overall, the cuticle plays a crucial role in maintaining the health and appearance of the hair shaft.