Final answer:
The five layers of the epidermis from outermost to innermost are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale.
Step-by-step explanation:
The five layers of the epidermis in sequence from the outermost to innermost layer are:
- Stratum corneum - the most superficial layer consisting of dead, tightly packed keratinocytes that form a tough, waterproof barrier.
- Stratum lucidum - found only on the palms of the hands and soles of the feet, consisting of translucent dead keratinocytes.
- Stratum granulosum - where keratinocytes start to fill with keratin and initiate the process of cell death.
- Stratum spinosum - the thickest layer, containing spiny keratinocytes and Langerhans cells.
- Stratum basale - the innermost layer, consisting of stem cells that continuously divide and form new keratinocytes.