Evolution of Human Skin Pigment Have you ever wondered how and why people are different colors? This paper discusses the evolutionary theories behind diversity in human skin pigment. Though previous theories hypothesized that darker skin evolved in order to protect people from sunburn and skin cancer, the prominent theory today relates to folate protection and vitamin D production. The prominent theory today about how and why skin pigment in humans developed with the color diversity that exists today
The human body is a complex system that often malfunctions. Many people believe that numerous diseases are natural reflection of the body aging and cannot be avoided. The goal of my paper is to elaborate this perception and explain that maintain healthy and active lifestyle can result in healthy body. Body organs are not all internal as is the brain or your lungs. There is an extremely important one that we wear on the outside and is the largest organ, the skin. So important that we would literally
The skin is the largest complex organ of the human body, accounting for about 15% of the total adult body weight. It covers the entire body surface as a flexible shield, which It performs many vital functions, including protection against external physical, chemical, and biologic assailants, as well as prevention of ex¬cess water loss from the body and a role in thermoregulation (Charkoudian, 2003). The skin is continuous, with the mucous membranes lining the body’s surface (Kanitakis, 2001). In
interesting from extinction to significant changes within a species. Human beings are no exception to biological evolution. Like other organisms around the world, humans have significantly changed overtime and have developed all sorts of diverse characteristics. One noticeable characteristic of human beings is the variation of skin color. Skin color has been used to identify, classify, and verify the variation that exists in the human population around the world. How did such a distinct variation arise
THE HUMAN SIGNIFICANCE OF SKIN Skin is often over looked and under appreciated by all of us. We live our lives habitually without realizing what an amazing and important role skin plays in our every day routine. Our skin protects us from many things, keeps us informed of our surroundings and makes us aware of many dangers present. The sense of touch is our most developed feeling and the predecessor of all of our other senses. The author gives several examples on how we have incorporated our sense
“Living with Burn Trauma,” an online article, states that “human skin is the largest organ of the body.” It provides many functions which assist humans to survive. What happens if this vital organ is destroyed? This is a question with which thousands of Americans are challenged annually. In the United States alone, 4,000 people die in burn accidents or from complications of burn injuries (“Prevention”). One common misconception is that burn victims have all come into contact with flames. Burns result
Skin optics Introduction Human skin is a multi-layered structure. It is generally divided into two layers, the epidermis and the dermis. Below the dermis a subcutaneous fat layer is found. The epidermis can be further divided into several sub-layers. These are the stratum corneum, the stratum lucidum, the stratum granulosum, the stratum spinosum, and the stratum germinativum. The stratum germinativum is usually referred to as the basal layer. Skin optics is the manner in which skin reflects
version of myself was not a realistic one. As it turns out, the figures in those magazines are not beautiful people; they are normal, ordinary human beings that were morphed into Western culture’s idea of beauty through the able abilities of Photoshop and makeup. How Westerners generally visualize beauty is simple to describe: narrow waist, large breasts, tanned skin free of blemishes, defined cheekbones, and an overall hourglass figure. Now that I am older and have experience with using beauty products
Whatever the surface of the hair, all human hair bind wigs require oil (in truth all human hair wigs, Remy hair extensions and hair pieces) for comparable reasons that characteristic advancement hair needs oil. • keep the fingernail skin even • keep the hair flexible • restore the hair • replace dissipated protein from the hair All human hair bind wigs (and all human hair wigs) have when in doubt been artificially arranged for surface or shading or both, unless the hair is tried and true and clearly
Skin is a natural protective barrier and function as body immunity first line of defence. It helps keeping out from microorganism that come from external environment, regulating temperature and fluid, also in some extent, it protects against sunlight. Skin consists of three layers, which are epidermis, dermis and subcutaneous layer. Dermis layer is the innermost layer, containing lots of connective tissues, blood vessels and nerve endings. The substituent of connective tissue including elastin and
the brain takes in information before it is processed to produce an action. When shooting a basketball, visual perception, touch perception and depth perception all play their part to produce the result: a jump shot. Visual perception is what aids a human analyze their surrounds, recognize what is around them and is crucial to help the brain make decisions based on what they see. When a basketball player faces the hoop before he shoots the jump shot, he must first identify where the backboard is. Visual
unethical, costly, ignorant, and because many cheaper and more reliable alternatives have been created. Many people are against animal testing, whereas many people also support animal testing. Many products must be tested before they are exposed to humans, from cosmetics, drugs, and to plastic bags. Famous make up companies, such as ‘L’Oreal’ and even ‘Glade’ tests on animals, while companies such as ‘Burt’s Bees’ and ‘Mary Kay’ do not test on animals (“Beauty”). The foremost reason people are against
American culture tells us that healthy skin and beauty comes with tan skins. It is hard to get away from the messages, TV ads, magazines, and larger than life billboards all tell us that “healthy skin” is “bronze” and “glowing.” So, many people, the majority of which are women and young ladies tan partly so they feel pretty and healthy as well as so they are seen by others to be healthy and attractive. While the sun and its warm rays do provide us many things, some of those are warmth, vitamin D
Cellulitis: A Bacterial Skin Infection Cellulitis is a fairly common bacterial infection of the skin. Cellulitis actually means “inflammation of the cells”. This infection is usually caused by the bacteria Streptococcus or Staphylococcus. Cellulitis infection can occur in anyone, yet there are some risk factors and a more susceptible population. Cellulitis is an “opportunistic” infection which occurs through breaks in the skin. Redness, warmth, swelling and pain are symptoms of this infection
order to continue. There were an estimated 3.5 million cases in 1986 but the disease has been greatly reduced over time and only 22 cases were reported in 2015. This disease will probably be the first parasitic disease to be completely eradicated in humans. Filariasis This disgusting worm parasite is spread by flies and mosquitoes. The adult worm spreads its larvae throughout the host’s lymphatic system and causes the lymph nodes to become clogged up. This also makes the tissue in the host’s body
The FDA stands for The Food and Drug Administration. The FDA is an agency of the United States Department of Health and Human Services. The FDA regulates food, prescription and over the counter drugs, cosmetics, veterinary and tobacco products, vaccines, electronics such as those that give off radiation as well as x-ray machines, and medical devices. The FDA is the oldest government organization that was committed to buyer security. The FDA, while not originally called this, started in 1906
There is Keratinized and non keratinized the difference between the two is that keratinized covers the dry areas of the skin where as non keratinized covers moist areas such as the larynx, vagina. Muscle Muscles need food and oxygen in order to work properly so if they are working hard but have not got enough food or oxygen then it causes pain and cramps. The strongest
The skin microflora comprises a wide array of inhabitants that play key roles in maintaining human health. The multitude of different habitats helps promote this diversity and combined with constant exposure to the outside environment, the skin microbiome is one of the more complex human microbiomes. On an individual basis, bacterial communities exhibit significant interpersonal variation with temporal stability at a variety of different skin locations ( ref). The constant shedding of these organisms
Tinea Pedis DEFINITION • Athlete’s foot is also known as ringworm of the foot. • It is a contagious fungal infection of the skin of the foot (particularly the upper layers of epidermis) caused by the fungus, Trichophyton or Epidermophyton floccosum. AETIOLOGY • Athlete’s foot is caused by dermatophytes, a group of parasitic fungi that cause infections in the outer layers of the skin. • The fungi flourish in warm and humid conditions making area such as public swimming pools, public showers and locker
based) treatments increase your risk of skin cancer? People from all over the world have always loved to spend time in the sun to get the nice tan color to their bodies. Tanning is what happens when one spends too much time out in the sun. When someone tans, he or she receives a darker shade to their skin tone than what they truly are. The person’s skin tone usually takes a couple of weeks, sometimes even a couple of months to go back to what their regular skin tone originally was. However, Tanning