Importance of Human Skin Pigmentations Essay Example | Topics and Well Written Essays - 500 words

Importance of Human Skin Pigmentations - Essay Example UVB is the short wave ultraviolet rays from the sun that are less dangerous than the short wavelength Ultraviolet rays known as the UVA. A UVB ray is absorbed at the surface of the skin and their intensity depends on the geographical area, time, and season. Vitamin D is responsible for absorption of calcium in our bodies for strong bones and teeth. Insufficient vitamin D causes brittle bones and rickets and people who have less exposure to the UVB rays from the sun must take vitamin D supplement. The skin is the largest organ and very important for the survival of human beings. Its protective nature to the other body organs and its pigmentation matters a lot in our health. Melanin is therefore very crucial for healthy individuals and where it lacks such as the people with albinism, medical attention is mandatory to prevent skin disorders and cancers. Skin pigmentation is very important in human bodies especially those living in hot regions such as the African continent. The main functions of melanin are the absorption of the ultraviolet rays from the sun that has a damaging effect by causing diseases such as the skin cancer. Light-skinned people have a problem in coping with the intense radiations from the sun as it causes a lot of damage to their skins. Inadequate melanin cannot absorb all the UVR rays from the sun especially when it is very hot leading to adverse effects such as premature aging, cancers, and vitamin D deficiency.

Discussions Replies Education Coursework Example | Topics and Well Written Essays - 750 words

Discussions Replies Education - Coursework Example Defend your choice. 1. Posted: by:  Margarett    Both art and culture have been the significant parts of earlier centuries. If we explore the association between arts and culture that existed in the 20th  century, we come to know that there had been a close connection between them. For example, artists of the 20th  century represented the overall culture of that century through their artworks. 20th  century is known as the beginning of today’s era of modernism. The artists of the 20th  century greatly revealed the elements of modernism, expressionism, and abstractions in their artworks. Moreover, the artists of the late 20thcentury also revealed through their artworks the need for change and peace that people wanted after the two big events of war that occurred in the first half of the century. In my view, the artist who best represented the social and cultural trends of his time period through his artworks was Pablo Picasso. He was a Spanish painter and sculptor w ho reinvented the foundations of art in the 20th  century through including the shadow of ongoing movements and overall environment in his artworks. My Response: Taking it a step further, it seems to me that the artists of the early 20th century were increasingly aware of the progression of art. What I mean is, the artists, although sometimes separated by continents appeared to be more aware and cognizant of what other artists were working on, what inspired them, the evolution of art during this time took much more rapid steps than say art a hundred years before. Obviously the industrial age and the beginning of the technological revolution had something to do with that – but one can’t help but wonder if art and culture were not even more closely connected with the artists of the 20th century than it had ever been before. 2. Posted by:  Andrea    Picasso is a great example. His art is so very different than the art of his predecessors.   In a sense, artists lik e him were taking big risks, departing from the norm! Class, what do you think it was that gave people the impetus to begin taking bigger risks in terms of art and music during this time?   My Response: Andrea, good point - Picasso definitely departed from the norm! However, art in the early 20th century was all about deviating from the norm and creating new ways of expression. Whereas art in past centuries had been more about gradually adopting new styles and mimicking the masters, art of the 20th century evolved at such a rapid and break neck pace that artists seemed to be doing all possible to express their own tastes and differentiate themselves. This collective attitude is what proved 20th century art to be so diverse and varied in such a short time scale. 3. Posted: by:  Dawna The other century ushered a new way of thinking into the art world.   With the world still recovering from the  atrocities of WWI, many artists reflected this in their style.   A new form of ar t was starting, the ism movement.   Fauvism, Cubism, Futurism, and German Expressionism.   Pablo Picasso of course, was a huge figure in this movement, with his extreme style and use of colors.   Many people that were used to more traditional art found his style and type of art disturbing and confusing.   I feel the one artist that encapsulates the time though would have to be Ernest Hemingway.   His point of view writing styles of WWI and help express the feelings after the war and the feeling of loss that many felt.