How does the structure of the papillary dermis relate to its functional properties?
1) Bundles of densely packed collagen fibers help the skin withstand stretching in many different directions.
2) The papillary dermis contains blood vessels that supply nutrients to the epidermis.
3) The structure of the papillary dermis allows for the formation of fingerprints.
4) The papillary dermis contains sensory receptors for touch and temperature.
