Layers of the Skin and Melanin

Front

Stratum corneum

Back

Layer of dead cells, 20-30 thick, keratinized, protects deeper layers, regularly shed.

Front

Stratum lucidum

Back

Thin, translucent layer, found in thick skin of palms and soles.

Front

Stratum granulosum

Back

Cells flatten, disintegrate, accumulate keratin granules, waterproof skin.

Front

Stratum spinosum

Back

Spiny layer, irregular cell shape, several cells thick, contains pre-keratin filaments.

Front

Stratum basale

Back

Constantly dividing, pushes up cells into next layer.

Front

Melanocytes

Back

Produce melanin, absorbed by nearby epidermal cells.

Front

Skin color difference

Back

Same number of melanocytes, difference in melanin production.