The squamous cell layer is located above the basal layer, and is also known as the stratum spinosum or "spiny layer" due to the fact that the cells are held together with spiny projections. Merkel cells, which are tactile cells of neuroectodermal origin, are also located in the basal layer of the epidermis. Melanoma develops when melanocytes undergo malignant transformation.
Translucent cells containing keratin fibrils skin#
Patches of melanin in the skin cause birthmarks, freckles and age spots. Sun exposure causes melanocytes to increase production of melanin in order to protect the skin from damaging ultraviolet rays, producing a suntan. Melanocytes produce the skin coloring or pigment known as melanin, which gives skin its tan or brown color and helps protect the deeper layers of the skin from the harmful effects of the sun. The basal cell layer contains cells called melanocytes. The basal cell layer is also known as the stratum germinativum due to the fact that it is constantly germinating (producing) new cells. The basal cells continually divide, and new cells constantly push older ones up toward the surface of the skin, where they are eventually shed. The basal layer is the innermost layer of the epidermis, and contains small round cells called basal cells. The epidermis layer itself is made up of five sublayers that work together to continually rebuild the surface of the skin: The Basal Cell Layer The epidermis contains the melanocytes (the cells in which melanoma develops), the Langerhans' cells ( involved in the immune system in the skin), Merkel cells and sensory nerves. 05 mm thick on the eyelids, and is 1.5 mm thick on the palms and the soles of the feet. The thickness of the epidermis varies in different types of skin it is only. The epidermis is the outermost layer of the skin, and protects the body from the environment. Acknowledgements Layers of the Skin The Epidermis
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