Now, within our Stratum spinosum, we also have the Langerhond cells that are responsible for basically protecting our skin from bacterial agents. So if we look at the following diagram, we have the stem cells merkel cells, melanocytes in the Stratum basil. Within our spinosum we have these living caroteneocides as well as these Langerhon cells shown in blue. Now, in this diagram, I skip the Stratum granolosum and I also skip the Stratum lucidum. I go directly to the Stratum corneum, this brown layer that consists of these dead carotenesites that contain the keratin, that gives the skin strength and makes it waterproof, impermeable to water. Now let's move on to this middle layer of our skin known as our dermis.