Stratum Basale and Stratum Spinosum EM
Stratum Basale and Stratum Spinosum EM

Stratum Basale and Stratum Spinosum EM

This electron micrograph shows cells of the stratum basale and spinosum. Note the bundles of keratin filaments, called tonofilaments, in the cytoplasm of cells in the stratum spinosum. Keratin filaments are a form of intermediate filament and connect to desmosomes at the plasma membrane.