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Free research papers and essays on topics related to: human body

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  • Cells Of The Human Body - 2,250 words
    Cells Of The Human Body Cells are the basic living units of all plants and animals. The cell is the structural and functional unit of all living organisms. There are a wide variety of cell types, such as nerve, muscle, bone, fat, and blood cells. Each cell type has many characteristics, which are important to the normal function of the body as a whole. One of the important reasons for maintaining hemostasis is to keep the trillions of cells that form the body functioning normally. An averaged size cell is one-fifth the size of the smallest dot you can make on a sheet of paper with a sharp pencil. Although cells may have quite different structures and functions, all cells share some common ch ...
    Related: blood cells, cell division, human body, genetic information, deoxyribonucleic acid dna
  • Cells Of The Human Body - 2,204 words
    ... lum of skeletal muscle stores calcium ions that function in muscle contraction. GOLGI APPARATUS The Golgi apparatus is composed of flattened membranous sacs, containing cisternae, that are stacked on each other like dinner plates. The Golgi apparatus modifies, packages, and distributes proteins and lipids manufactured by the rough and smooth endoplasmic reticula. Proteins produced at the ribosomes of the rough endoplasmic reticulum are surrounded by a vesicle, or little sac, that forms from the membrane of the endoplasmic reticulum. The vesicle moves to the Golgi apparatus, fuses with the membrane of the Golgi apparatus, and releases the protein into the cisterna of the Golgi apparatus. ...
    Related: blood cells, cell division, human body, white blood cells, health care
  • Human Body - 1,516 words
    Human Body In the Beginning Within a month of conception, the cluster of cells that will, in the course of time, become a human being begins throbbing, signaling the development of a primitive heart. Scarcely four weeks more pass before an intricate network of veins and arteries the size of a pea forms and subdivides into a tiny replica of the four chambers that will one day make up the adult heart. As the fetus grows, so does its vitally important circulatory system. Although most of the functions of the heart remain dependent upon the mother throughout the entire pregnancy, in the latter stages the organ becomes strong enough to beat on its own. Even so, until birth the baby is cared for a ...
    Related: body weight, human body, high cholesterol, heart association, excess
  • Human Body - 1,468 words
    ... rising source of saturated fat may be the nondairy creamer used in coffee. A study by University of Nebraska Medical Center professors found that 22 out of 25 non-dairy creamers contained coconut oil. Coconut oil is more saturated than cream, butter, lard or beef fat. Be aware of other prepared foods containing coconut oil. Another important consideration is increasing the ratio of polyunsaturated fats to saturated fats. Polyunsaturated fats lower cholesterol by increasing lipoprotein breakdown and removal, and lowering the synthesis of lipoproteins in the liver. Also, the essential fatty acid content, such as linoleic acid, is beneficial. It decreases platelet aggregation and serum chol ...
    Related: human body, heart association, good news, coronary heart disease, sunshine
  • In The Human Body, Each Cell Contains 23 Pairs Of Chromosomes, One Of Each Pair Inherited Through The Egg From The Mother, An - 1,072 words
    In the human body, each cell contains 23 pairs of chromosomes, one of each pair inherited through the egg from the mother, and the other inherited through the sperm of the father. Of these chromosomes, those that determine sex are X and Y. Females have XX and males have XY. In addition to the information on sex, 'the X chromosomes carry determinants for a number of other features of the body including the levels of factor VIII and factor IX.'1 If the genetic information determining the factor VIII and IX level is defective, haemophilia results. When this happens, the protein factors needed for normal blood clotting are effected. In males, the single X chromosome that is effected cannot compe ...
    Related: cell, human body, pair, early stages, more effective
  • The Effects Of Altitude On Human Physiology Changes In Altitude Have A Profound Effect On The Human Body The Body Attempts To - 1,861 words
    THE EFFECTS OF ALTITUDE ON HUMAN PHYSIOLOGY Changes in altitude have a profound effect on the human body. The body attempts to maintain a state of homeostasis or balance to ensure the optimal operating environment for its complex chemical systems. Any change from this homeostasis is a change away from the optimal operating environment. The body attempts to correct this imbalance. One such imbalance is the effect of increasing altitude on the body's ability to provide adequate oxygen to be utilized in cellular respiration. With an increase in elevation, a typical occurrence when climbing mountains, the body is forced to respond in various ways to the changes in external environment. Foremost ...
    Related: altitude, human body, human physiology, physiology, profound
  • The Effects Of Altitude On Human Physiology Changes In Altitude Have A Profound Effect On The Human Body The Body Attempts To - 1,831 words
    ... taneously as the body acclimatizes to the higher elevation. Moderate AMS includes a severe headache that is not relieved by medication, nausea and vomiting, increasing weakness and fatigue, shortness of breath, and decreased coordination called ataxia (Princeton, 1995). Normal activity becomes difficult at this stage of AMS, although the person may still be able to walk on their own. A test for moderate AMS is to have the individual attempt to walk a straight line heel to toe. The person with ataxia will be unable to walk a straight line. If ataxia is indicated it is a clear sign that immediate descent is required. In the case of hiking or climbing it is important to get the affected ind ...
    Related: altitude, human body, human physiology, physiology, profound, side effects
  • Sexually Transmitted Diseases - 875 words
    A major question facing many teenagers is whether or not to have sex. A result of having sex is contracting sexually transmitted diseases. Sexually transmitted diseases, or venereal diseases affect 10 to 12 million Americans each year. (Daugirdas 75) In the United States, sexually transmitted diseases strike an average of one person every 1.5 seconds. (76) About half of STD patients are under the age of twenty-five. (Landers 45) Nearly 2.5 million teenagers are infected with these deadly diseases. (Welsh A-5) A few types of sexually transmitted diseases are gonorrhea, herpes, chlamydia, syphilis, etc. These diseases can be fatal if not attended to. In addition to those epidemic diseases alre ...
    Related: sexually, sexually transmitted disease, sexually transmitted infections, transmitted, transmitted diseases
  • A Time In History - 938 words
    A Time In History A Time in History Ive been asked before: What time period in history would you most like to visit and experience the most? And I would have to stop and wonder where exactly I would want to go. I use to have much trouble in answering this question. There are countless events and points of time in history that I would absolutely love to get to see with my own eyes and experience with my own body and mind. However, I now find it rather easier to respond without having to stop and think for so long. Somewhere along thereabouts of the 13th century would definitely be one of my choices now. There are many things I would like to see for myself. For one, the works of art produced d ...
    Related: european history, history, human body, higher level, boccaccio
  • A Time Of Turbulence - 641 words
    A Time Of Turbulence By Natasha All was quite on the land, peace was wide spread. The grass shuffled with the gentle wind on the vast land of Cuzco. The Incas, were said to have lived there, ruled by a loving, yet firm hand. A Proxy, ruled their clan. When they conquered they did no harm. But melted into one. No bloodshed, but unity surpassed the violence of their human hearts. In the steep mountain sides did they farm, the work was agonizingly rigorous and dizzyingly high. Yet they not only persevered, they excelled, at life with concepts beyond our realm of perception. The rhythmic language they possessed was called Quechua. Quecha is still uttered by the tongue of those today, with their ...
    Related: turbulence, human body, the killers, faith and religion, cruel
  • Abuse Of Innocent - 794 words
    Abuse Of Innocent Abuse of the Innocent Is it right to force a mouse to live it's live in a laboratory cage to test anti-cancer drug? How would you like to be squeezed in a cage with many other animals, not being able to touch the grass, run around and play, smell the flowers, or go for a walk in the warmth of the sunshine? Animal cruelty is wrong because we are hurting the Innocent. Animals experience and feel pain, fear, anxiety, stress, depression, boredom, joy and happiness. Animals are very intelligent, some ever learn our own language. Most people experience their first bond with an animal. Not only do they bring a companion and a friend into our lives, but also unconditional love and ...
    Related: abuse, life span, animal cruelty, los angeles, miserable
  • Accidents - 1,731 words
    Accidents Aircraft Investigation Each mishap has their own characteristics and there is no substitute for good old-fashioned common sense and initiative. Each wrecked aircraft has its own story to tell if properly investigated. However Air Force guidelines are quick to point out that investigators in their eagerness seek out the causes, often ignore safe investigation practices and common safety precautions. Air Force Investigators are maybe in even more difficult position due to the hazards that are unique to the military war fighting machines, Ill discuss a few of these hazards briefly before I get into the steps of Air Force accident investigations. Munitions Extreme care must be given to ...
    Related: human body, early stages, government agencies, acquire, questioning
  • Acupuncture Today - 648 words
    Acupuncture Today Today, Mrs. Williams will be experiencing a new treatment for her chronic back pain. Chiropractic medicine had failed her before, and her daily prescription drugs were worth neither the money nor the side effects they caused. When the doctor came into the room with a tray of thin, long needles, Mrs. Williams knew that her hematophobia would cause her no discomfort; these needles were not for drawing blood. Her back pain will be relieved through acupuncture, the 5000-year-old Chinese practice of treating pain through the balancing of energy channels. Since President Nixon's historical visit to China in 1972, a new wave of traditional Chinese medicine has swept through the Un ...
    Related: acupuncture, traditional chinese, back pain, traditional chinese medicine, remedy
  • Aging Theories - 1,767 words
    ... ter a certain number of divisions, the clock genes are triggered and may produce proteins responsible for cell destruction (Keeton, 1992, 50). Cellular Aging In 1961, a discovery made by Leonard Hayflick showed that normal, diploid cells from such continually Areplaced@ parts of the body as skin, lungs, and bone marrow, divide a limited number of times. Although the cells stop dividing at the point just before DNA synthesis, they do not die. The longer-lived the species, the more divisions the cells undergo. As the age of an individual increases, the number of potential divisions decreases (Ricklefs and Finch, 1995, 29). This discovery was found using fibroblasts, or cells found in the c ...
    Related: aging, aging process, bone fracture, concise encyclopedia, testosterone
  • Agression - 2,144 words
    Agression Aggression Aggression is a critical part of animal existence, which is an inherent driving force to humans, as we, too, are animals. The source of aggression within humans is a long summative list, but before trying to understand its source one must apply a working definition of aggression. Aggressive behavior is defined by Encyclopedia Britannica as any action of an animal that serves to injure an opponent or prey animal or to cause an opponent to retreat. (7) David G. Myers states that aggression is any physical or verbal behavior intended to hurt or destroy.(9) There are many types of aggressive behaviors, which can be differentiated from the factual act to the hidden motives. F ...
    Related: agression, slave labor, final solution, verbal behavior, track
  • Aids - 1,527 words
    ... AIDS from handshakes, hugs, coughs, sneezes, sweat, tears, mosquitoes, or other insects, pets, eating food prepared by someone else, or just being around an infected person. A person can't get it from sharing a cigarette, cigar, or pipe, drinking from the same fountain, or from someone spitting on him or her. A person also can't get it from using the same swimming pools, toilet seats, phones, computers, straws, spoons, or cups. Although the virus has been found in saliva, medical opinion states there is no evidence of contamination through wet kissing(What are HIV/AIDS 1). HIV is not spread through the air or water, unlike many other viruses(HIV/AIDS 2). No one has ever caught AIDS by go ...
    Related: aids, protease inhibitors, local government, state and local government, isolated
  • Aids In The Media - 887 words
    Aids In The Media It was only nineteen years ago when the world was first introduced to the AIDS virus, but by 1983 a significant number of people had died from the dreaded disease and media coverage began. AIDS was almost immediately viewed as one of the most stimulating scientific puzzles of the century. On June 5, 1981, the Federal Centers of Disease Control reported five cases of a rare pneumonia among gay men. It is the manner in which this epidemic has been reported that is my main focus. " In the case of AIDS, the popular media, especially the news media, have played an extremely important role in drawing upon pre-established knowledge and belief systems to create this new disease as ...
    Related: aids, mainstream media, mass media, media, media coverage, news & media, popular media
  • Air Pollution - 1,431 words
    Air Pollution Air pollution Introduction With the great concern surrounding the destruction of the earths atmosphere due to air pollution, the immediate and direct harm caused to the human body is often over shadowed. While many are aware that our careless use of hazardous chemicals and fossil fuels may leave the planet uninhabitable in the future, most over look the fact that they are also cause real damage to our bodies at this moment. Such pollutants cause damage to our respiratory system, leading to the fluctuation of the life span of an individual depending on a number of conditions. Amongst these conditions are the individuals specific geographic location, age, and life style. This pap ...
    Related: air pollution, pollution, life span, educational foundation, excessive
  • Air Pollution Report - 1,203 words
    ... es not affect all parts of the world. It is most common in a city such as Los Angeles where these weather conditions exist. Ozone depletion is looked upon as a problem that up till now, we can not fix. Air pollution has caused this hole in the ozone layer. The ozone layer absorbs 99% of the sun's harmful energy. It prevents ultraviolet radiation from reaching the Earth's surface and the troposphere. It protects humans from sunburn, skin and eye cancer, and cataracts. It also prevents much of the oxygen in the troposphere from being converted to ozone (gas). In the mid-seventies chemists F. Sherwood Rowland and Mario J. Malian discovered CFC's were creating a global chemical time bomb by ...
    Related: air pollution, pollution, pollution control, pollution prevention, management program
  • Albrecht Durer - 1,562 words
    Albrecht Durer Albrecht Durer was born in Nurembourg in May 21, 1471. His father, Albrecht Durer was a goldsmith, he had come from Germany to Nurembourg in 1455 and married Barbara Holper. Barbara's father was Albrecht's master. Albrecht was his father's third son. He was named Albrecht because of a family tradition which he has been the third representative so far. Albrecht had three brothers named Laszlo, Albrecht, and Ajtos. Albrecht was apprenticed to his father at the age of 13. His father introduced him to the working with metal and the use of tools with laid the ground work for his skill of engraving. He also learned painting from his father at the age of 13. He preferred to draw and ...
    Related: albrecht, giovanni bellini, family tradition, growing concern, fresh
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