Graduate Resources

Your skin is the largest organ in your body. An average adult male’s skin weighs over three kilograms, and if spread out would cover about the area of a twin-size blanket. Skin is waterproof, and it is constantly renewing itself. It keeps germs out, lets you feel things, protects your inner organs, and helps keep the body’s temperature stable.

Skin comes in many colours. If your skin is exposed to the sun’s ultraviolet rays, it will burn, and cause damage that may not reveal itself for many years. Following a burn, skin may tan, turning a shade of brown. If your skin tans evenly, it will be brown all over. But it might only tan in certain spots … in which case you’ll have freckles!

Let’s look at what causes skin to turn brown …

Skin is made up of three layers. The outer layer that you can see is called the epidermis. Skin cells on the surface are constantly dying and flaking off, to be replaced by new cells that form below and make their way to the surface.

Inside the epidermis are special cells called melanocytes. These cells produce a pigment called melanin when ultraviolet light hits them. (A pigment is a chemical which has a distinct colour). Melanin is brownish black. The more melanin that is released by the melanocytes in your skin, the browner your skin will be.

Most people have the same number of melanocytes in their skin … some just produce and distribute more melanin than others.

Not all parts of your skin contain the same amount of melanin. The palms of your hands and the soles of your feet contain almost none of the pigment. On the other hand, your areolae (the dark skin around your nipples) contains a lot.

Your skin contains melanocytes which release melanin into the surrounding cells when sunlight hits them. The purpose of this is so that the brown pigment will protect the lower layers of skin from further burning.
Some people have melanin which is darker, so their skin is a darker brown. Some people have skin which produces more melanin than others, so their skin is darker too, especially after being exposed to the sun. In some people the melanin is clumped together rather than spread out evenly, so they have brown patches … called freckles.

Freckles are small patches of melanin the accumulate in the skin, that grow and get darker as they are continually exposed to sunlight. Freckles are more common in people with fair skin, blue eyes, and especially in people with red hair.

Freckles first appear in children at about age five, and increase in number, size and darkness during the summer, fading and decreasing in number in the winter.

Shown at the left is a melanocyte that is producing melanin, and distributing it to the nearby tissues of the skin through its ‘tentacles’.

Freckles aren’t dangerous, and are not a sign of disease or skin problems. However …

Sunlight contains two types of ultraviolet radiation: UVA and UVB.

UVB radiation is what causes burning of the skin (sunburn), skin cancer, wrinkles, and premature aging of the skin.
UVA rays cause tanning, but are linked to problems such as impaired vision, skin rashes, and allergic or other reactions to drugs.

Skin damage from overexposure to the sun is cumulative. It continues to add up over the years, and cannot be reversed. You should always wear UV-blocking lotion when outside, even when it’s cloudy (UV rays aren’t stopped by clouds). This is especially important for children, as most of the permanent damage to your skin happens before age 18.


Share on facebook
Share on twitter
Share on pinterest
Share on linkedin
Share on reddit
Share on print

Click Below For More Great Resources

 Accounting Essay

 Anthropology Essay

 Architecture Essay

 Art Essay

 Biology Essay

 Botany Essay

 Brand Management Essay

 Business Communication Essay

 Business Development Essay

 Business Essay

 Business Plan

 Business Research Methods Essay

 Chemical Analysis Essay

 Chemistry Essay

 Civil Engineering Essay

 Communications Essay

 Comparative Literature Essay

 Construction Management Essay

 Consumer Behaviour Essay

 Copywriting Essay

 Criminology Essay

 Earth and Environmental Sciences Essay

 Econometrics Essay

 Education Essay

 Educational Research Essay

 English and Linguistics Essay

 English Language Essay

 English Literature Essay

 Environmental Sciences Essay

 Film Studies Essay

 Finance Essay

 Financial Accounting Essay

 Forensic Psychology Essay

 History Essay

 Human Resources Essay

 Human Rights Essay

 Humanities Essay

 Industrial Engineering Essay

 Information Technology Essay

 Integrated Marketing Communications Essay

 International Business Essay

 International Hospitality Management Essay

 International HRM Essay

 Internet Marketing Essay

 Introduction to Business Essay

 Law Essay

 Linguistics Essay

 Literature Essay

 Management Essay

 Management Information Systems Essay

 Market Research Essay

 Marketing Essay

 Marketing Management Essay

 Media Studies Essay

 Music Essay

 Nursing Essay

 Philosophy Essay

 Political Science Essay

 Project Management Essay

 Psycholinguistics Essay

 Psychology Essay

 Religion Essay

 Science Essay

 Social Sciences Essay

 Sociology Essay

 Strategic Management Essay

 Strategic Marketing Essay

 Technology Essay

 Training and Development Essay

 Travel and Tourism Essay

 University Application

 World Literature Essay

 Zoology Essay

Most Popular

Get The Latest Updates

Subscribe To Our Newsletter

No spam, just notifications about new products, updates and discounts.


Related Posts

Student Support

Student Support at Graduate Research Student support is always available at Graduate Research. We constantly change and update our student support, special offers and discounts

Essay Structure

A Guide to Essay Structure from Graduate Research. Essay structures in principal are fairly simple. All written assignments require you to include introductory paragraph(s) and

How to Write a Statement of Purpose Essay

[imageeffect type=”frame” width=”250″ height=”188″ alt=”” url=”wp-content/uploads/2013/04/statement-of-purpose.jpg” ] Students applying for a graduate and PhD program will more than likely have to know how to write

How to Write Website Content

[imageeffect type=”frame” width=”250″ height=”188″ alt=”” url=”wp-content/uploads/2012/09/website-content.jpg” ] Writing web content is vital for building industry interest and ultimately increasing targeted audiences. As you may already

Need Help?

Our Academic Writing Services can help with all question types and formats.

What you can expect:

  • 100% Custom writing answering your question, task or requirement
  • Critical argument and reasoning
  • Logically structured
  • Full and complete reference list
  • Free similarity check

Contact Us

Get in touch to discuss your requirements or use the online order form to place your order

Pay Securely

Pay with confidence and confidentiality using our secure online payment portal

Take Delivery

Download your completed project. Expertly researched and written to your instructions