| In vertebrates, the limb apical epidermis promotes proliferation and inhibits differentiation of underlying mesenchymal cells. |
| These include the epidermis and inner tunic and some mesenchyme derivatives which have differentiated into blood cells in the larva. |
| However, they have some ability to sense light through receptors in the epidermis. |
| Healing is expected within two weeks by regeneration of epidermis from keratinocytes within sweat glands and hair follicles. |
| There is another layer of cells between the basal cells and the keratin-rich epidermis known as spiny cells. |
| Radiation inhibits mitotic activity in the germinal cells of the epidermis, hair follicles, and sebaceous glands. |
