Main Branches of Integumentary System
It covers the entirety of our bodies to close off our inner organs from the outside world. The epidermis is avascular, meaning it does not contain any blood or blood vessels. Instead, it receives nutrients via diffusion from the dermis. The epidermis also has its own distinct layers. There are two different types of skin: thick and thin.
The skin also plays a role in immunologic surveillance, sensory perception, control of insensible fluid loss, and homeostasis in general. The skin is also highly adaptive with different thicknesses and specialized functions in different body sites. This article will discuss the anatomy of the skin, including its structure, function, embryology, blood, lymphatic, and nerve supply, surgical and clinical significance. The epidermis is further divided into 5 layers on thick skin like the palms and soles (stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum, while in other places the epidermis has 4 layers lacking the stratum lucidum) (Someya T, Amagai M. 2019).
Finally, the skin plays a role in the synthesis of vitamin D, which is necessary for our well-being but not easily available in natural foods.
Maranduca MA, Branisteanu D, Serban DN, Branisteanu DC, Stoleriu G, Manolache N, Serban IL. Synthesis and physiological implications of melanic pigments. Oncol Lett. 2019
Someya T, Amagai M. Toward a new generation of smart skins. Nat. Biotechnol. 2019