HAIR
CUTS DON'T HURT.The reason is quite simple, because hairs
are made of dead cells,so we don't feel pain.The dead hair
cells are filled with a tough , waterproof protein called
Keratin, as are nails,
and the skin flakes that we lose
daily in their millions from our skin surface.All these
things are part of the protective overcoat that cover and
protect our body.
SKIN- Skin is really thin but quite complex .Its made of two layers ; The epidermis provide protection, and is constantly worn away and replaced.The dermis glues the epidermis to the rest of the body and deals with feelings, temperature control, and food and oxygen supplies
WHY SKIN IS IMPORTANT.-
Skin provide a waterproof covering around our body.
COLOUR OF SKIN- Our skin is colored by a pigment called melanin.It protects us by absorbing harmful ultraviolet rays in sunlight , it automatically makes more melanin and gives us a suntan.But at the same time we must also protect it from excessive sunlight by covering up and applying a sun-cream.
SWEAT GLAND.- The Armpit sweat glands produce a thicker sweat than the body's other sweat glands..When bacteria feed on this sweat they release chemicals that can smell musky and unpleasant.
SKIN DWELLERS- Many kinds of organism live in our skin.Some common one's are-
Fleas- These feed on blood and then leap on to the next victim.
Head Lice- The most common ,it grip hairs,lays eggs and then pierce the scalp to feed on blood.
Ticks- It attach to the skin and blow like a balloon,as they feed on blood and then drops off.
Scabies mites- It borrow under the skin to lay eggs ,which causes intense itching .
Eyelash mites- These live harmlessly in the eyelash follicles of every one.
Bacteria-These are presents in trillions, but usually harmless unless they get inside our body through a cut or injury.
INTERESTING FACTS-
SKIN- Skin is really thin but quite complex .Its made of two layers ; The epidermis provide protection, and is constantly worn away and replaced.The dermis glues the epidermis to the rest of the body and deals with feelings, temperature control, and food and oxygen supplies
WHY SKIN IS IMPORTANT.-
Skin provide a waterproof covering around our body.
- It form a barrier between our delicate tissues and harsh outside world
- It stops germs getting into our body.
- It filters out harmful ultraviolet radiation in sun light that can damage our cells
- It helps our body maintain a steady temperature
- It houses receptors that enable us to detect touch, pressure,vibration, heat , and cold.
COLOUR OF SKIN- Our skin is colored by a pigment called melanin.It protects us by absorbing harmful ultraviolet rays in sunlight , it automatically makes more melanin and gives us a suntan.But at the same time we must also protect it from excessive sunlight by covering up and applying a sun-cream.
SWEAT GLAND.- The Armpit sweat glands produce a thicker sweat than the body's other sweat glands..When bacteria feed on this sweat they release chemicals that can smell musky and unpleasant.
SKIN DWELLERS- Many kinds of organism live in our skin.Some common one's are-
Fleas- These feed on blood and then leap on to the next victim.
Head Lice- The most common ,it grip hairs,lays eggs and then pierce the scalp to feed on blood.
Ticks- It attach to the skin and blow like a balloon,as they feed on blood and then drops off.
Scabies mites- It borrow under the skin to lay eggs ,which causes intense itching .
Eyelash mites- These live harmlessly in the eyelash follicles of every one.
Bacteria-These are presents in trillions, but usually harmless unless they get inside our body through a cut or injury.
INTERESTING FACTS-
- The Thickest skin in human body is on the sole of the feet.It's thickness is 4.7mm or .2in.
- The Thinnest skin in human body is the is on the eyelids.It's thickness is 0.12mm or 0.005in.
- The number of skin flakes a human body lost every minute is 50,000.
- A person has 100,000 hairs on his head
- Our head hairs grows 10mm in a month.
- On an average '80 ' head hairs are lost and replaced daily .
- A person has 2.5 million sweat pores in his body.
- The total surface area of an adult's skin is '21sqft.'
- The total weight of an adult man's skin is 3.2kg.
Hair Care
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