Skin+-+RK

=Introduction=

toc You are a part of the skin cell. You see bacteria floating towards you, and you land on some of the cells. The dead cells fall slowly downward to get rid of the bacteria. There are many different layers underneath you that help you live. Different cells come up to the ones that fell off. You see a deep wound but soon the wound heals back slowly to it's original self. This is the life of a skin cell. = Skin Cells Affect what you Look Like =

The skin cells on our body are very important because they create a protective barrier to our bodies. Skin cells are produced when dead cells fall off, then the new cells replace them. For example, certain cells in our body create fingernails to help us scratch or pick up things and give us our sense of touch. Did you know that when we rub our hands together it causes dead cells to fall off and it causes all the bacteria on it to fall off, and by that it makes us even more healthy. When our body gets hot and sweats, it’s a great thing because sweat glands release heat to cool the body down and the skin keeps the body at a normal temperature. Also, melanin gives skin our color and can give skin it’s freckles. ” Melanin is formed by the melanocytes in the epidermis. All people have about the same number of melanocytes. However, the melanocytes of dark-skinned people produce more melanin than do those of light-skinned people. The amount of melanin produced in each person's skin is determined mainly by heredity. However, exposure to sunlight increases the production of melanin, causing light skin to tan. In some cases, melanin builds up in small spots, forming freckles. Most freckles appear on the face and hands. Exposure to sunlight increases freckling” (Lynfield)The skin cells don’t do all the work in the body, so there are other structures that help the skin do its job. =Parts of The Skin Cells= A skin cell has many different parts like an engine, It has it’s epidermis that helps protect the cell from any harm or danger. It contains many dead cells that reproduce every 2 weeks to keep us more protected.”The horny layer consists of between about 15 and 40 rows of dying cells.”(Lynfield) The skin is not all made of dead cells, there is also a layer of living cells with a spiky protection. Certain cells in our body help our skin thrive, like Langerhans that protect against infection. Deep inside there is the dermis that has blood vessels, nerve endings, and connective tissue. The skin doesn't only have so many structures it can also heal deep wounds over a couple of weeks. =How Skin Cells Heal Wounds= media type="youtube" key="TLVwELDMDWs" height="145" width="255" align="right" There are many steps into healing a wound. As soon as we break the epidermis, the skin takes a long process into healing it into a scar. First is the hemostasis which is the body’s reaction to two immediate threats, that you are losing blood and that the epidermis is compromised. Next blood vessels tighten to stop the bleeding that can cause a blood clot. A cell named fibrin stops any pathogens and bacteria from getting into the skin while when the blood gets blocked it causes your skin to turn red. After a couple of days white blood cells come to destroy any bacteria that may have come in. Then later fibers come to help heal the skin barrier where it got cut. Soon the skin matures itself and creates a scar after a long process of healing. =Conclusion=

Skin cells are like a shield they protect anything that come in. When they see something coming in they protect it so they can keep the human alive. When the shield gets hit it gets fixed by a blacksmith just like when skin gets cut it also heals with help of cells and putting ointment on our skin. The shield has many different materials in it like the skin has many layers in it. We need our skin so we can stay alive and stay healthy. =References= Glass, Susan. Cells. Logan, Perfection Learning, 2005.

“How Do Wounds Heal.” Ted Ed, ed.ted.com/lessons/how-a-wound-heals-itself-sarthak-sinha/review_open#question-8.

Lynfield, Yelva Liptzin. “Skin.” World Book Student, www.worldbookonline.com/student/article?id=ar513220&st=skin#tab=homepage. Accessed 27 Jan. 2017.

“Skin.” Brain Pop, www.brainpop.com/health/bodysystems/skin/\. Accessed 30 Jan. 2017.

“Skin.” Power Knowledge Life Science, Rosen Publishing, www.pklifescience.com/article/431/skin. Accessed 30 Jan. 2017.