What is the function of Stratum spinsum?

The stratum spinosum, also known as the "prickly layer," is a layer of the epidermis located above the stratum basale and below the stratum granulosum. Its primary function is to provide strength and flexibility to the skin due to the presence of desmosomes, which are intercellular junctions that connect keratinocytes. Additionally, the stratum spinosum contains Langerhans cells, which play a role in immune responses by detecting pathogens and alerting the immune system. Overall, it contributes to the protective barrier of the skin.