Papillary dermis Definition
It is defined as the topmost layer of the dermis that entwines with the rete epidermis ridges. It is made up of fine collagen fibers that are arranged in a loose fashion.
It is abbreviated as PD.
Papillary dermis Appearance
It is a skin layer that is elastic and external in origin. It stretches over all the areas of the body.
Papillary dermis Functions
This dermis layer consists of blood vessels and connective tissues that provide the epidermis (the outer skin layer) with nutrients. In other words, it nourishes the avascular epidermis with important nutrients. The blood capillaries also remove used and oxygen-depleted blood from the skin to allow entry of fresh blood.
It also helps regulate the skin temperature (thermoregulation). It also protects the vulnerable and sensitive systems inside the skin from exposure to germs and other objects that are harmful for the body.
PD also comprises of free sensory nerve endings and special structures known as Meissener’s corpuscles in regions of the body that are highly sensitive such as the genitals and fingers.
Apart from high temperatures, the nerves located in the PD can also perceive other dangers from the surrounding areas. The nerves send messages to the brain and associated nervous system and the body automatically reacts by moving away from the source of pain or danger.
Papillary dermis Pictures
Picture 1 – Papillary dermis
Picture 2 – Papillary dermis Image