So the cells of the ectoderm basically make up the outer portion of that developing embryo. And so there's no surprise that the ectoderm layer basically forms the outer portion of our body and that includes our skin, our integumentary system. So basically the outer layer of the skin, the epidermis of the skin, is formed by the ectoderm as well as all the accessory structures down inside our skin. For example, we have the nails, we have the hairs and we have the hair follicles. We have the sebaceous glands, the oil glands. We also have the sweat glands that are formed by the ectoderm germ layer.