Immunology

Sniffles and sneezes: A Q&A about allergies with Dr. Ryan Steele

With allergy season upon us, YaleNews spoke to Dr. Ryan Steele, instructor of clinical medicine at Yale School of Medicine, about the current season, prevention, treatments, and other facts allergy sufferers need to know. ...

Immunology

Food allergies can strike at any age

(HealthDay)—You might be surprised to learn that food allergies can start in adulthood and involve a food you've eaten without a problem for your entire life.

Health

Sunscreen use could lead to better blood vessel health

A new study suggests that sunscreen protects the skin's blood vessel function from harmful ultraviolet radiation (UVR) exposure by protecting dilation of the blood vessels. Perspiration on the skin may also provide protection ...

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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