Disclosure statement

Cara McDonald go not job-related for, consult, own shares in or receive capital from any firm or organization that would benefit from this article, and also has discover no appropriate affiliations beyond their academic appointment.

You are watching: What is the largest sense organ


View every partners


The epidermis is the outermost, cellular class of the skin which varies in thickness depending upon the body site. On median it’s less than fifty percent a millimetre thick. The epidermis each other a “brick wall” that cells well-known as keratinocytes, which space bound strict together and act come prevent totally free movement the moisture, pathogens and chemicals into or the end of the body.

Keratinocytes replicate indigenous the basal layer and work their way up to the external surface (known together the stratum corneum) over a period of around 28 days. As soon as they with the surface the chop bonds in between them rest apart and also they room shed.

Other 보다 keratinocytes, pigment-producing cells well-known as melanocytes and immune cells well-known as Langerhans cells additionally exist in ~ the epidermis. Melanocytes inhabit the basement membrane, in ~ the base of the epidermis and also produce a pigment well-known as melanin both innately (giving the skin its organic colour), and also in response to ultraviolet irradiate (UV) exposure (giving the skin a sunlight tan).

The melanin is a brown pigment the is take away up into the overlying keratinocytes. This pigment will then absorb UV irradiate (from the sun) when it access time the skin, in order to protecting the basal calls underneath from UV damage.

The epidermal cells likewise develop hair follicles, sweat glands and also sebaceous (oil) glands which extend down into the layer below known as the dermis. The little ducts from every of this glands open onto the skin surface. Sweat and also sebum (oil) provide an antibacterial and also protective barrier on the skin.

The dermis lies beneath the epidermis and also is 20-30 times thicker. It’s made up of a thick layer of fibrous (collagen) and also elastic (elastin) tissue. The dermis offers the skin the integrity, strength and elasticity; and houses blood vessels, glands and also hair follicles, and also nerves and their receptors.

Beneath the dermis lies the subcutis (also recognized as the hypodermis), a specialised layer that adipose (fat) and fibrous tissue. The thickness that this layer different dramatically depending upon the site and a person’s human body shape and also weight. That cushions the human body from exterior trauma, insulates from the cold and also stores power (fat).


we pay much more attention come the health of our skin 보다 perhaps any other organ. Unsplash/Isabelle Winter

The role of the skin

The extraordinary range of attributes performed by healthy skin is still comes to light. The basic day-to-day functions include:

Helping united state fight off bugs, allergens, toxins and carcinogens via the parts of our immune mechanism that exist in our skin

Giving us the feeling of touch _ providing interaction with physical surroundings, permitting all fine and gross motor activities and allowing pleasurable and sexual stimulation

Wound healing

Beauty and also physical attraction – the quality and also condition that the skin significantly contributes come the late of health, wellness, youth and beauty.

What is typical skin and also how can you optimise it?

Normal healthy and balanced skin has countless important roles and also thus need to be treated v care and respect. Many human being only start focusing on the skin as soon as there is an abnormality or at the very least a perceived problem.

Common concerns include dryness, sensitivity, oiliness, congestion, wrinkles, sun damage and signs of ageing. Return these states are every within the spectrum that normal useful skin, they might be thought about problematic if major or undesirable.


you only get one skin. Don’t do this come it. Unsplash/Maciej Serafinowicz

Normal, healthy and balanced skin the is not exposed to extreme physical or environmental insults might not require any particular care or protection, but for those who want to optimise or improve their skin, some simple steps have the right to make a huge difference.

See more: Average Shoe Size 7 Year Old Boy S' Shoe Size By Age Chart

The an essential to skin care is consistency and routine, and also it deserve to take time to evaluate the changes. A simple regime of day-to-day protection from excessive UV radiation, defense from excessive irritation and also drying (by preventing drying soaps, excess water or irritating chemicals) and aiding that the skin’s obstacle properties (using a moisturising safety layer) will an outcome in noticeable development in practically all skin.

Switching and changing products and routines is commonly counterproductive and will prevent you from see expected advancement in time. It’s worth looking after her skin, together you’ll wear the every day because that the rest of her life.