On top of that, our reticular layer also contains many important structures. For example, it contains our blood vessels and that includes the arteries that bring the blood to the cells of the skin as well as the veins that take away the deoxygenated blood filled with waste products back into our blood system. We also contain the roots of the hair follicles and these hairs, which also consist of carotene, basically move all the way to the outside of our body. So these are our hairs that extend to the outside and these are the hair roots. Now, we also have oil glands, also known as sebaceous glands and oil is produced to basically make the hair impermeable to water. We also have these green structures which are the sweat glands.