The epidermis is the outermost layer of the skin, made up of stratified squamous epithelium. It consists of five distinct layers:
Stratum basale: The deepest layer, containing stem cells that divide to form new keratinocytes. Stratum spinosum: Known for its spiny appearance under a microscope, this layer provides strength and flexibility to the skin. Stratum granulosum: This layer contains granules rich in lipids, which help form a waterproof barrier. Stratum lucidum: Found only in thick skin like the palms and soles, it provides an additional layer of protection. Stratum corneum: The outermost layer, composed of dead keratinized cells that are shed regularly.
