Medical research

Researchers provide novel insights into human skin aging

In human, the skin is one of the organs that exhibit early-onset aging-associated dysfunction. As a critical physical barrier, the skin is composed of a variety of cell types including fibroblasts and keratinocytes. Due to ...

Health

Why do older people heal more slowly?

I recently visited an 83-year-old patient in the hospital after EMTs rushed her to the ER with an infected leg wound. Her ordeal started inconspicuously when she bumped into the sharp edge of a table and developed a small ...

Oncology & Cancer

Should men be concerned about prostate cancer?

Prostate cancer is the second-most diagnosed cancer in men after skin cancer. Approximately 1 of 9 men in the U.S. will get prostate cancer in his lifetime. Most men diagnosed with the disease won't die from it. More than ...

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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