Most interesting facts about SKIN

MOST INTERESTING FACTS ABOUT SKIN

 What is skin?

Skin is the largest organ of  the body,with total area coverage of 20 square feet.

It is very interesting to know that skin is made of total 7 layers, these are:

 1.Stratum corneum

2. Epidermis

3.Epidermal-epidermal junction

4.Dermis

5.Hypodermis

6.Muscles

7.Bones( bone cell)

Skin plays a vital role in detecting hot and cold, regulating your body temperature and protecting your muscles, bones and internal organs from outside infection and disease. But that’s just for starters. There is so much more to your skin than you might think. 

Here are some of the most interesting facts about your skin:

• Skin accounts for about 15% of your body weight.
• The average adult has approximately 21 square feet of skin, which weighs 9 lbs and contains more than 11 miles of blood vessels.
• The average person has about 300 million skin cells. A single square inch of skin has about 19 million cells and up to 300 sweat glands.

• Your skin is its thickest on your feet (1.4mm) and thinnest on your eyelids (0.2mm).
• The skin renews itself every 28 days.
• Your skin constantly sheds dead cells, about 30,000 to 40,000 cells every minute! That’s nearly 9 lbs. per year!

• Some sources estimate that more than half of the dust in your home is actually dead skin.

• Dead skin comprises about a billion tons of dust in the earth’s atmosphere.
• Your skin is home to more than 1,000 species of bacteria.

• Skin that is severely damaged may try to heal itself by forming scar tissue, which is different from normal skin tissue because it lacks hair and sweat glands.

• Skin can form additional thickness and toughness — a callus — if exposed to repeated friction or pressure.

• Some of the nerves in your skin are connected to muscles instead of the brain, sending signals (through the spinal cord) to react more quickly to heat, pain, etc.
• Your skin has at least five different types of receptors that respond to pain and touch.

• Changes in your skin can sometimes signal changes in your overall health.
• There are mainly 4 type of skin:
• Oily skin
• Normal skin
• Combination skin
• Dry skin
• Melanin is the pigment that determine the skin color,and it is produced by skin cells when exposed to sun.

• Homo sapiens started out in Africa with darkly pigmented skin, full of melanin to protect from the intense ultraviolet radiation from the sun.

• Mutations led to lighter skin that can supposedly regulate vitamin D production in lower sunlight levels. 
• Seven genetic variants associated with lighter skin developed at least 270,000 years ago and four more than 900,000 years ago.
• Dark color is the earliest skin color of human.

Love your color ,you are one of your kind.

Credits: all images are taken from Google images.