Skin and Hair

SKIN

Skin is the outside layer on our flesh and it forms the largest organ on our body.Skin play an important role in keeping our body healthier.It protects us from many of the infections and diseases.Skin maintains our internal body temperature through processes like excretion of sweat through skin and the circulation of blood through the network of blood vessels within our skin.

For healthy body, we also have to keep our skin healthier. Our body cells need nutrition to keep our skin healthy by some nutrients such as proteins, vitamins, and minerals. If these nutrients are missing in our diet, our skin remains unhealthy.

In cold environment, skin drops it blood flow very low which retains heat in our body and warm blood flows through our vital organs within the chest and abdomen and to the brain.Whereas in hot environments skin and the fat layer beneath it acts as insulators. Skins rate of blood flow increases making the skin a heat radiator. Also the evaporation of sweat through skin increases the heat loss from our body which cools our internal body temperature.

Appearance of skin is counted important for our wellbeing and intraction with others.Sometimes skin is damaged by some diseases.The symptoms of these diseases include moles, rashses and itching may be obvious.



HAIR

Hair is actually a modified type of skin. Hair grows everywhere on the human body except the palms of the hands, soles of the feet, eyelids, and lips. Hair grows more quickly in summer than winter, and more slowly at night than during the day.

Like hair, nails are a type of modified skin. Nails protect the sensitive tips of fingers and toes. Human nails aren't necessary for living, but they do provide support for the tips of the fingers and toes, protect them from injury, and aid in picking up small objects.