So earlier we mentioned two types of immune cells. We mentioned Langerhon cells, which are cells found within the epidermis. And Langerhon cells are responsible for interacting with T cells of our immune system. And that basically helps us protect from bacterial agents. On top of that, the hypodermis, the subcutaneous lay of the skin, contains macrophages that can actually engulf bacterial cells. Now, function number six is that as our endocrine gland.