malpighian layer

The Malpighian layer is the deeper part of the epidermis, consisting of living cells that have not yet transformed into horny material. This layer is crucial for skin structure and function.1

Structure of the Malpighian Layer

The epidermis is divided into two main parts: a lower living layer and a superficial layer of dead cells. The Malpighian layer encompasses the stratum basale (basal layer) and the stratum spinosum (spinous or prickle-cell layer).2

• Stratum Basale: This is the innermost layer, directly adjacent to the basement membrane that attaches to the dermis. Cells in this layer are continuously formed through mitosis.2
• Stratum Spinosum: Located just outside the basal layer, its cells have a spiny appearance due to desmosomes, which are structures connecting adjacent cells.2

These living cells move towards the skin's surface, undergoing changes to form the outer cornified (horny) layer of dead cells. Specialized cells called melanocytes, which produce the pigment melanin, are also found in the epidermis, migrating from the neural crest during embryonic development.23