1. defends your body from any organisms that threaten the destruction of cells immune system 2. white blood cells that produce antibodies lymphocytes 3. system of vessels that are responsible for the removal of bacteria from the bloodstream epidermis 4. outer layer of the skin which, along with other functions, makes the body waterproof lymphatic system 5. inner layer of skin which contains blood vessels, sweat glands, hair follicles, and nerve cells dermis