Skin+-+CM

=Introduction= Skin is the largest cell in the body, just bigger than the female's reproductive system, the creator of life the egg cell. Skin cells are like a knights in a battle, protecting the body from diseases and bacteria. An average adult's skin spans 21 square feet, weighs nine pounds, and has about 11 miles of blood vessels. The skin releases as much as three gallons of sweat a day in hot weather. = How does a Wound Heal itself? =  Wounds heal themselves because when we are wounded, our skin begins to replace itself through a complicating process. There are three stages, the first stage is **hemostasis**, the second stage is **inflammation**, and the final stage is **vasoconstriction**. Hemostasis is the skin’s response to two immediate threats, losing blood, and the barrier of the epidermis has been compromised. Inflammation is when the skin almost completely closes up and sends special cells to kill any bacteria that has entered the body. Vasoconstriction is when the blood vessels come closer together to minimize bleeding to form a blood clot preventing any blood from leaving the body, and bacteria from entering the body.

=media type="youtube" key="TLVwELDMDWs" width="303" height="151" align="right" What Causes Sunburns? =  Sunburns happen when the skin is exposed to too much sunlight. Too much exposure to sunlight can cause skin cancer. Sun burns turn the skin red because blood flow increases to the burned area to help cure the skin. Eventually, all of the dead skin cells start to peel off. ==

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Image of skin peeling from a sunburn. = = = What makes tattoos perma nent? =  Humans shed skin losing roughly 40,000 skin cells per hour, about 1,000,000 per day. How do tattoos stay permanent? Tattoos stay because the needle goes through the epidermis into the dermis and damages it (black ink stays longer), so it is harder for it to be eaten by cells to cause it to fade. The first tattoo was found on the skin of a Peruvian mummy in 6,000 B.C. Tattoos are marks of the dangerous and deviant, or for youth fads around the world.

toc = What Causes Acne? =

Tanning can make the skin dry which will cause the skin to get irritated and can lead to more acne in the future. The sun's rays can cause premature aging and skin cancer. That’s why you should wear sunblock. Even though washing your face helps to remove dirt and oil from your pores, washing too much can cause dryness and irritation. Avoid scrubbing your face because it can also irritate your skin. Popping a pimple may make it seem less noticeable temporarily, but popping can cause it to stay around longer. You can actually push bacteria, dead skin cells, and oil further into the skin, causing more swelling and redness when you squeeze zits and pimples. Sometimes marks can last for many months and true scars will last forever.

= Cell structure =

The epidermis has a life cycle just like all other cells. The new cells move to the upwards to the outside and when they die after about 2 weeks and fall off, new cells replace the old ones. The dead cells look like flat bags under a microscope. They stay looking like flat bags for around 2 weeks and then shed off. Melanin is a dark colored pigment occurring in the hair, skin, and iris of the eye in people and animals. It is responsible for tanning of skin exposed to sunlight.

= Conclusion =

 Skin cells are important to care about they are like a knights in a battle, protecting the body from diseases and bacteria. Skin cells are made from a tough protein called keratin. In addition, skin is waterproof, and every 28 days the skin renews itself. “All skin colors, whether light or dark, are not due to race but to adaption for life under the sun.” -Alan Goodman, Biological Anthropologist.

= References =

Works Cited Ed, Ted. “Ted Ed.” Ted Ed. Ted Ed, 10 Nov. 2014. Web. 7 Mar. 2016. . Logica, Derma. “Sunburn.” Dermalogica. Dermalogica, n.d. Web. 9 Mar. 2016. . Skin Cells. Discovery Education. Discovery Education, 2002. Web. 17 Feb. 2016. . “Skin Structure and Function.” Skin structure and function. ABPI, n.d. Web. 17 Feb. 2016. . What Causes Sunburns. Prod. Sci Show. What Causes Sunburns. SciShow, 13 July 2015. Web. 9 Mar. 2016. .