Thickly cornified stratified squamous epithelium. The cells in the bright red layer and in the pale layers above it are completely flattened and dead, and have lost their nuclei.

• 掌皮（厚的角化复层扁平上皮）。亮红色细胞层（透明层）和骑上的染色很淡的细胞层中，细胞都极为扁平化，核消失，细胞死亡。