17 Facts About Human skin

Human skin is the outer covering of the body and is the largest organ of the integumentary system.

The Human skin has up to seven layers of ectodermal tissue guarding muscles, bones, ligaments and internal organs.

Human skin is similar to most of the other mammals' skin, and it is very similar to pig skin.

Such skin variety provides a rich and diverse habitat for bacteria that number roughly 1000 species from 19 phyla, present on the human skin.

The average human skin cell is about 30 micrometres in diameter, but there are variants.

The red colour underlying the Human skin becomes more visible, especially in the face, when, as consequence of physical exercise or the stimulation of the nervous system, arterioles dilate.

Fitzpatrick scale is a numerical classification schema for human skin colour developed in 1975 as a way to classify the typical response of different types of skin to ultraviolet light:.

For example, ageing Human skin receives less blood flow and lower glandular activity.

The disinfected Human skin surface gets recolonized from bacteria residing in the deeper areas of the hair follicle, gut and urogenital openings.

The Human skin is continuous with the inner epithelial lining of the body at the orifices, each of which supports its own complement of microbes.

Oily Human skin is caused by over-active sebaceous glands, that produce a substance called sebum, a naturally healthy Human skin lubricant.

The oily-Human skin type is not necessarily bad, since such Human skin is less prone to wrinkling, or other signs of ageing, because the oil helps to keep needed moisture locked into the epidermis.

Oily Human skin can be sallow and rough in texture and tends to have large, clearly visible pores everywhere, except around the eyes and neck.

Human skin has a low permeability; that is, most foreign substances are unable to penetrate and diffuse through the skin.

Research has shown that spherical particles have a better ability to penetrate the Human skin compared to oblong particles because spheres are symmetric in all three spatial dimensions.

Scientists previously believed that the Human skin was an effective barrier to inorganic particles.

Development of techniques that increase Human skin permeability has led to more drugs that can be applied via transdermal patches and more options for patients.