The Circulatory System Essay Example

The Circulatory System Essay Example The Circulatory System Paper The Circulatory System Paper General Functions   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The circulatory system is the body’s main transport network and cooling system (De Graff, 1998). The human body needs many external substances to survive. We need air, food, and water. However, these substances are not readily absorbed by the body through initial intake. For example, food that is eaten and digested is not yet used to fuel the body’s billions of cells. The nutrients that have been processed need to be transported to each cell in the body in order for them to be used. This is one of the jobs of the circulatory system. The circulatory system is tasked with carrying the important substances that the body needs where they are needed (Hillendale Health, 2007). Furthermore, the system is also responsible for carrying some of the wastes from the cells such as carbon dioxide, away from the cells to be expelled by the body (Delos Johnson, 2006). This cycle of carrying nutrients to body cells and carrying wastes from th em is a way by which the system contributes to the maintenance of physiological homeostasis. Another way that it contributes to homeostasis is by helping maintain the temperature of the body. Without oxygen to burn, the cells in the body will become cold and eventually die (Delos Johnson, 2006). Thus, oxygenated blood carries oxygen to the cells and releases it in order to maintain homeostatic temperature. Last but not the least, the circulatory system also maintains homeostasis by fighting off outside threats that have infiltrated the body. White blood cells which also travel through the system fight back diseases and help keep the body healthy and they need the circulatory system for them to be able to reach the places in the body where particular bacteria are doing damage (Delos Johnson, 2007). Interactions with other organ systems   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   When we eat food or drink water, it enters our body through our digestive system and is processed in the stomach. Afterwards, the processed food is transported through the small intestines where it is further digested. The small intestine’s inner walls are covered with microscopic finger-like projections called villi which are primarily responsible for taking the nutrients from the digested food and transferring them to the bloodstream where they are carried to the rest of the body (Maton et. al., 1993). Thus, the digestive system and the circulatory system work closely together to nourish the body with food and drink. The circulatory system also works closely with the respiratory system. We take in air through our nose and from there it travels to our lungs. From there, pulmonary arteries which are a part of the circulatory system carries oxygen-depleted blood to absorb more oxygen while releasing the carbon dioxide that it has accumulated from the cells that it delivered nutrients to (Maton et. al., 1993). Of course, the circulatory system takes blood containing nutrients and oxygen to other organ systems of the body in order to enable them to continue functioning. The blood carries nutrients to our muscles, our sensory organs, our brain, and all other parts of our body that need it (Maton, 2003). Parts and functions The Heart   It is a powerful muscle that pumps the blood through the entire circulatory system (Hillendale Health, 2007). The Blood It is the main substance that flows throughout the circulatory system. There are red blood cells and white blood cells that both travel through the circulatory system (Hillendale Health, 2007). Plasma which is the liquid part of the blood carries both these blood cells through the system (Hillendale Health, 2007). The red blood cells carry nutrients from the small intestine and oxygen from the lungs to the cells all over the body (Hillendale Health, 2007). They are also the ones that carry carbon dioxide away from body cells and back to the lungs to be released as waste (Hillendale Health, 2007). The white blood cells travel to areas where harmful germs are infecting body cells and fight those foreign elements to keep the body healthy (Hillendale Health, 2007). There are also platelets found in the bloodstream which acts to help stop bleeding whenever the body gets wounded (Hillendale Health, 2007). For example, whenever we cut ourselves on some sharp object and bleed, the platelets stick to where we cut ourselves and attract more platelets to do the same. This plugs out the wound so that the bleeding stops. The Blood Vessels The blood vessels are the tubes where the blood passes through. There are three types of blood vessels which are arteries, veins, and capillaries (Hillendale Health, 2007). The arteries are blood vessels that carrying oxygenated blood away from the heart while veins carry blood back to the heart (Hillendale Health, 2007). Capillaries are very tiny blood vessels that serve as connections between arteries and veins (Hillendale Health, 2007). The Heart: A closer look   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The human heart is found in the middle of the thorax with its largest part slightly situated to the left just beneath the breastbone (Maton et. al., 1993). It is a mesh of muscle cells that are joined together by contiguous cytoplasmic bridges (Maton et. al., 1993). Tissues found on the heart’s walls are unique because they have qualities both of smooth muscle tissues and skeletal muscle tissues. The heart is covered by a protective sac called the pericardium (Maton et. al., 1993). The pericardium itself is composed of two parts. The fibrous pericardium is made of dense fibrous connective tissue that serves as the heart’s outer protection while the serous pericardium contains fluid that eases friction generated by heart contractions thus protecting the heart from friction caused by its own beating (Maton et. al., 1993). The right atrium is situated on the right side of the heart where the veins carrying deoxygenated blood are found. This is so that the right atrium can collect the deoxygenated blood and pass it through the heart which pumps it by the right ventricle to the lungs to be oxygenated once more (Maton et. al., 1993). After the blood is oxygenated by the lungs, it goes back to the heart through the left atrium and is pumped by the heart through the left ventricle to the rest of the body. It should be noted that the muscle wall that surrounds the left ventricle is thicker than the wall surrounding the right ventricle. This is because it is harder to pump blood to the rest of the body than to just pump it to the lungs and back (Maton et. al., 1993). Hence, thicker muscle means that the left ventricle is more powerful in pumping blood than the right ventricle. Hypertensive heart disease   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   This diseases pertains to complications caused by arterial hypertension that affects the heart (eMedicine, 2007). Arterial hypertension which is more commonly known as high blood pressure is a condition wherein the pressure of the blood being pumped through the circulatory system is steadily increasing (eMedicine, 2007). This happens due to a variety of factors. Excessive intake of fat can clog up arteries and thus make it more difficult for blood to pass through. Thus, this makes the pressure of blood passing through the arteries increase. Because of the heightened pressure, the arterial walls are subjected to greater strain (Lip et. al., 2000). This can be imagined by visualizing a hose whose channel has been partially blocked. Fluid passing through that hose exerts more pressure on the hose walls and threatens to rupture the hose. In the same way, too much clogging in the arteries can cause pressure to build so much that it could ruptur e the arteries. Once this condition is elevated to dangerous levels, the heart gets affected by the imbalance in the pressure and hypertensive heart disease is developed (Lip et. al., 2000). The disease causes the heart to be strained more and more and may eventually cause it to breakdown and fail. The pressure can also burst blood vessels which can also damage the system. People suffering from this disease are easily fatigued due to the excessive work that the heart is coping with from the increased blood pressure (eMedicine, 2007). They would also have an irregular pulse, have difficulty sleeping, and feel a greater need to urinate at night (eMedicine 2007). If not treated with appropriate medicine, proper exercise and a good diet, hypertensive heart disease can lead death and is in fact one of the leading causes of death in the country (eMedicine, 2007). References De Graaff, V. (1998). Human Anatomy, 5th edition. WCB McGraw-Hill. Delos Johnson, D. (2006). The Circulatory System. Retrieved May 22, 2008 from: globalclassroom.org/hemo.html eMedicine. (2007). Hypertensive Heart Disease. Retrieved May 22, 2008 from: emedicine.com/med/topic3432.htm Hillendale Health. (2007). Circulatory System. Retrieved May 22, 2008 from: http://hes.ucfsd.org/gclaypo/circulatorysys.html Lip, G., Felmeden, D., Li-Saw-Hee, F., and Beevers, D. (2000). â€Å"Hypertensive heart disease. A complex syndrome or a hypertensive cardiomyopathy?† European Heart Journal. no. 21 p. 1653–1665. Hopkins, J., McLaughlin, C., Johnson, S., Warner, M., LaHart, D., and Wright, J. (1993). Human Biology and Health. New Jersey: Prentice Hall.

Make a Mixture and a Compound from Iron and Sulfur

Make a Mixture and a Compound from Iron and Sulfur A mixture occurs when you combine matter in a way where the components can be separated again. A compound results from a chemical reaction between components, forming a new substance. For example, you can combine iron filings with sulfur to form a mixture. All it takes is a magnet to separate the iron from the sulfur. On the other hand, if you heat the iron and sulfur, you form iron sulfide, which is a compound. What You Need Iron filingsSulfur  (powder or flowers of sulfur)MagnetTest tube or beakerBurner or hot plate or stove Creating a Mixture and Then a Compound First form a mixture. Stir some iron filings and sulfur together to form a powder. You have just taken two elements and combined them to form a mixture. You can separate the components of the mixture by stirring the powder with a magnet (iron will stick to it) or by swirling the powder with the magnet under the container (the iron will fall toward the magnet at the bottom - this is less messy).If you heat the mixture over a bunsen burner, hot plate, or stove, the mixture will start to glow. The elements will react and will form iron sulfide, which is a compound. Careful! Unlike the mixture, the formation of a compound cant be undone so easily. Use glassware that you dont mind ruining. When you form a mixture, you can add components in any ratio that you want. It doesnt matter if there is more iron than sulfur, for example. When you form a compound, the components react according to a set formula. If there is an excess of one or the other, it will remain after the reaction that forms the compound. For example, you may have some leftover iron or sulfur in the tube with your mixture. 2 grams of sulfur with 3.5 grams of iron filings will completely react.

Airlines fault because of safety violations Research Paper

Airlines fault because of safety violations - Research Paper Example Such factors include safety violation. According to Pollock, (2009) the regulatory body (FAA) has for much times fined many of airlines due to the safety violation. The highest fine ever to be charged by Federal Aviation Administration is $ 10.2 million. The latest incidence that attracted the fine action of FAA involved a Texas-based airline. In the report of year 2012 of FAA, the airline delayed repair of its two MD-80. Such delays posed a safety compromise to the passengers. The Texas-based airline operated with this fault for 58 times in violation of safety and the Federation regulation. According with the FFA, (2010) report, the airline was taxed $ 7.1 million. According with the regulation and policies of FAA, negligence in maintaining the airline with knowledge constitutes a breach of safety regulation. The Texas-based airline had deliberately postponed the maintenance of the airline. By postponing, the service providers were intentionally putting the life of passengers at risk. The report established that the management was aware of the several autopilot problems yet they continued to defer the maintenance. The rules and regulation of FAA were enacted following the injury and death caused by airlines. According to FFA, (2010) most of the faults leads to very fatal accident that claimed life of many citizens. In a research done by Pollock, (2009) most airlines in most cases defer maintenance of the airline in the festive seasons such Christmas where there is a lot of travelling. One example given in the research is MD-80 affiliated to Texas-based airline. In the busy Christmas travel season, the autopilot disconnected many times posing a threat on the passenger traveling. It has been established that most a time is due to negligence and drive to make money in the peak season. For this case, the airline was charged a fine of $ 8 million. More

Nutrition in elderly Essay Example | Topics and Well Written Essays - 2000 words

Nutrition in elderly - Essay Example This population requires greater care as there are many reasons that lead to malnutrition in the elderly. These include different pathological conditions that restrict their dietary intake. The nutritional requirements of the elderly need to be assessed and explained so that this group of the population can be catered and the prevalence of malnutrition amongst the elderly can be reduced. Nutrition in Elderly Elderly people are subjected to the dilemma of malnutrition. Furthermore, efforts have been made to give them sufficient nutritional balance but there are still many hurdles that have stopped this process. First of all, the nutritional requirements of the elderly are sometimes not very well described. As the basal metabolic rate and lean body mass both decline as one grows old, the energy requirement of an older person per kilogram of his or her body weight also reduces. This process of ageing also adversely affects the different nutrient needs of the human body. For instance, as the requirements for some of the nutrients reduce over time, data suggests that other essential nutrients’ needs might further increase when a person gets old. Therefore, there is a pressing need to reconsider the currently recommended every day nutrient allowances for the elderly group. Additionally, there is a rising demand all across the world for guidelines by WHO which are capable to urge the national authorities to highlight the nutritional needs of the increasing elderly populations all over the world (BBC, 2012). Nutrition in elderly is therefore an important issue in nursing that needs to be understood as the nutritional requirements of the elderly are different from the other age groups. 1. Background Of The Issue a.) History Almost more than 1.4 million Americans who are above the age of sixty five reside in nursing homes according to the data collected by Department of Health and Human Services’ Administration on Aging in 2008. Nutrition does play a vital role in encouraging the health of elderly occupants of the nursing homes. Comprehending the facts about how these nursing homes cater the dietary and nutritional needs of their people can assist one in learning what to expect from them and also to look for a nursing home in the future (World Health Organization, 2012). b.) Advice for Interested People many federal and state regulations are there to help restrict serious nutrition problems from taking place in the nursing homes; but one should plan on taking a practical approach for the monitoring of the nutrient intake of the elderly. Whenever you are considering placing your elder one in a nursing home, you should talk to the staff about their nutritional program. Also, you should arrange for visiting on a meal time so that you can try the meal yourself as well. Then you can also review the facility’s procedure and policy manual which should exclusively explain the nutritional protocol and plan of the senior citizens home. N ow if you have any concerns, you can arrange for a meeting with the nutrition program director to discuss as well as solve any concerns you have regarding what your loved one is eating (World Health Organization, 2012). c.) Impact of Public Policy/Health care Delivery Nursing homes need to cater a wide range of healthy snacks and meals to their residents as well as sticking to the restrictions placed on the residents related to their diets. Those people who are not able to feed their own self need to be assisted by the staff. Weight loss and

The Rights to Bear Arms Essay -- Bill Rights second amendment Constitu

The Rights to Bear Arms   Ã‚  Ã‚  Ã‚  Ã‚  Gun control is a very controversial issue among society at present. Many feel guns are the cause of a great amount of crime. This has been an especially popular topic recently in lieu of the shooting at Columbine and other high schools across the country. Are these crimes reason to take away our freedom to bear arms? I do not believe so. The average person uses guns mainly as a means of protection. If limitations are placed on guns, they will only stop the average American from obtaining a gun. The real criminals out there will still be able to obtain guns through the black market. Every American should have the right to protect them self. The second amendment to the constitution of the United States says, â€Å"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.†1 This amendment enforced a practice that had been occurring in America for years. When the constitution was forming, there was not a large standing army. Many inhabitants were minutemen, who needed a gun to help protect society; this is why the militia was mentioned in the amendment. The militia clause is merely a rationale for preserving the right.1 Even if today's well-regulated militia were the National Guard, the Second Amendment still protects an individual right to keep and bear arms.   Ã‚  Ã‚  Ã‚  Ã‚  Many people feel this amendment should be changed, or more restrictions should be placed on people who want to purchase guns. Some believe that guns hurt more than they help, even though statistics prove otherwise. I feel that guns are not as big of a threat to society as people are lead to believe, mainly by the media. Fatal gun accidents declined by almost sixty percent from 1975 to 1995, even though the number of guns per capita increased by almost forty percent.2 The cart below shows that a number of crimes have started decreasing, even though sales in guns has increased. Recently, the media has shown many incidents of shootings in schools. This is nothing new, as the media makes it out to be. Schools have had trouble with crime for many years. Years ago metal detectors were installed in schools across the nation to stop violence in schools. These detectors were placed because there was a problem in the past. Crime related to guns has, in fact, gone down. The reality does not... ...were to happen here. Although we are a democracy, as more freedoms are taken away, we move farther and farther away from the very idea of America. The history of mankind has many examples of what happens when the state becomes too powerful and there is no check on it by an armed population.5 It is impossible for the government to control the sales of gun through the black market, which provides these dangerous weapons to murders and drug dealers. Shouldn’t it be the government’s duty to allow the average law abiding citizen to protect them self. Bibliography Bieber, James D. The Right to Keep and Bear Arms. http://www.yaf.com/philosophy.html Gun Accidents. http://www.guncite.com/gun_control_gcgvacci.html. 2/13/2000. Illinois State Firearm Laws. http://nraila.org/research/19990716-BillofRightsCivilRights-015.html. September 1997. Larson, Erik. "The Story of a Gun", The Atlantic Monthly. January 1993. Origional Intent and Purpose of the Second Amendment. http://www.guncite.com/gc2ndpur.html, 1/12/2000. Schools and Gun Violence. http://www.guncite.com/gun_control_gcgvscho.html. 6/13/199 Second Amendment Stuff. http://secondamendmentstuff.com/. 1/16/2000

Difference Between Personal and Professional Ethics

. What is your perception of personal ethics Vs professional ethics? If different, can you explain the difference? A brief definition of personal ethics according to me would be an individual's belief about morality or conscience . It defines our stand on what is right or wrong. This branch of ethics gradually develops since our childhood and tend to emulate the things which are set as an moral value to us by our parents or guardians in the family. It can heavily be influenced from any major incident in our life. Again I believe every individual may have its own definition of code of personal ethics. It can overlap at times or it may conflict with one another as well e. g a vegetarian may find eating non veg food as a crime. Personal ethics can influence all different areas of life such as family,finances,religion or relationship. Here the individual has the liberty and the freedom to choose his/her own set of rules if his concience conflict with that of the sorrounding's. Professional ethics defines adherence to rules and regulation . Here the individual is expected to follow religiously, the code of ethics framed by the organization . It can be heavily influenced by the culture of the organization but it cannot change as frequently as the personal ethics. There may be at times where our personal ethics can conflict with our professional one ,for instance, when a judge enforces a death sentence on a criminal as per our law even if he is personally against death penalty. So by setting out expected behaviour in the form of professional ethics,professionals try to uphold a good reputation. On the other hand,professionals are also expected to be honest and respect the code of ethics by not getting involved in any conflict of interest. A conflict of situation may occur if an individual tries to achieve personal goal while at profession which ultimately leads to corruption. Coming across various range of people in personal and professional life , I generally find people carrying the same attitude in both sphere of life. In short ,there is definitely a line between personal and professional ethics,but that line to me is very thin and fine

101 Economics - Consumer Theory Easily Explained - 2732 Words

CONSUMER THEORY: THE NEOCLASSICAL MODEL AND ITS OPPOSITE EVOLUTIONARY ALTERNATIVE by Valentino Piana (2003) From http://www.economicswebinstitute.org/essays/consumertheory.htm The standard textbook model of consumer is an outstanding example of the neoclassical paradigm in economics [1]: a h y p e r-rational agent maximises something by choosing an optimal bundle of things. Here, the hyper-rational consumer maximises utility (i. e. an overall generic measure of well-being) by exhausting a given budget. He has a pre-defined income to spend on - for simplicity s sake - two goods, called X and Y, respectively. He could spend his entire income buying only X, thus purchasing a quantity of X equal to income divided by the†¦show more content†¦Choices are sequential. Information available to Neoclassical approach T h e c o n s u m e r h a s f u l l Limited information. consumer information about all existing products, their use and their effects on his welfare (utility). Degree of difficulty o f Zero. The choice is always C h o i c e c a n b e easy, the choice easy, with all pros and cons moderate or extremely already evaluated and difficult, d e p e n d i n g o n compressed in a monotonic the situation. measure (utility). I m p o r t a n c e advertising o f None. The consumer has its own tastes and they can t be changed. T h e l i m i t e d information of the consumer can be extended by advertising. Depending on the decision-m a k i n g s t y l e , advertising can have an important influence beyond the mere information. Importance of the opinion of others None. The consumer stands T h e c o n s u m e r c a n alone in her/his preferences. explicitly ask others or at least have contact with the opinion of others, who are stratified according to the relationship to th e consumer (e.g. friends, teachers,...). None. The consumer can receive i n s t r u c t i o n t o appropriately use the product and enjoy it better. 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