The statement is false. Sunlight, ultraviolet light, and X-rays all darken the skin. It is not because they increase blood flow to the dermis.
What are the functions of the dermis layer?
- The predominant roles of the dermis are to regulate the body temperature.
- It also delivers nutrient-rich blood to the epidermis.
- The skin's specialized cells and structures, such as blood vessels, are located in this layer.
- The skin receives nutrition and oxygen, and cell products and waste are removed.
How is the skin darkening?
- The skin layer consist of melanocytes.
- Melanin is a skin pigment.
- It is produced by melanocytes.
- It gives skin its tan or brown color and aids in shielding the deeper layers of the skin from the sun's damaging rays.
Thus, sunlight, x-rays, and UV rays are also causing skin darkening. It is because of melanin. Increased blood flow to the dermis is not a cause.
Learn more about sunlight and skin darkening here:
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