Diseases, Conditions, Syndromes

UK warns COVID monitor devices work less well for darker skin

Britain's state-run healthcare service warned Saturday that devices used by people with COVID to monitor blood-oxygen levels at home may give inaccurate readings for people with darker skin.

Oncology & Cancer

Study reveals source of DNA mutations in melanoma

The mutations that give rise to melanoma result from a chemical conversion in DNA fueled by sunlight—not just a DNA copying error as previously believed, reports a study by Van Andel Institute scientists published today ...

Skin

The skin is the outer covering of the body. In humans, it is the largest organ of the integumentary system made up of multiple layers of mesodermal tissues, and guards the underlying muscles, bones, ligaments and internal organs. Skin of a different nature exists in amphibians, reptiles, birds. Human skin is not unlike that of most other mammals except that it is not protected by a pelt and appears hairless though in fact nearly all human skin is covered with hair follicles. The adjective cutaneous literally means "of the skin" (from Latin cutis, skin).

Because it interfaces with the environment, skin plays a key role in protecting (the body) against pathogens and excessive water loss. Its other functions are insulation, temperature regulation, sensation, synthesis of vitamin D, and the protection of vitamin B folates. Severely damaged skin will try to heal by forming scar tissue. This is often discolored and depigmented.

In humans, skin pigmentation varies among populations, and skin type can range from dry to oily. Such skin variety provides a rich and diverse habit for bacteria which number roughly a 1000 species from 19 phyla.

This text uses material from Wikipedia, licensed under CC BY-SA