The Circulatory System In Animals Physical Education Essay

The Circulatory System In Animals Physical Education Essay The role of the circulatory system in animals is the transportation of nutrients and oxygen to every cell that is in an animal organism, and to also remove waste products. The heart, blood vessels and blood are three vital components the body needs to survive. There are also other major roles the circulatory system has which are later discussed. Mammals have a double circulatory system meaning two circuits that blood journeys through; pulmonary and systemic. Pulmonary: Pulmonary circulation is the transportation of blood from the heart, to the lungs, and back to the heart again. The  pulmonary  circuit transports blood to the lungs for it to be  oxygenated  and then transported back to the heart. In the lungs, carbon dioxide is taken away from the blood, and oxygen taken up by the haemoglobin in the red blood cells. Systemic: The  systemic  circuit transports blood around the body to deliver the oxygen and returns  de-oxygenated  blood to the heart. Systemic circulation provides nutrition to all of the tissue located in the organism, with the exclusion of the heart and lungs as they have their own systems.   See below for a diagram of the circulatory system. http://biology-forums.com/gallery/14755_10_09_12_7_22_08_85152044.jpeg This diagram is showing the circulatory system; the pulmonary circuit where it is picking up oxygen from the lungs, and the systemic circuit which is transporting oxygen to the body. Author unknown (Date unknown) Heart: The heart is a muscular pump, when the heart is beating it is pumping blood to the lungs and around your body. The amount of blood pumped can be calculated. Heart rate x stroke volume = cardiac output. Below is a diagram of the heart. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3np92SAdG3DsDeBNfRR7A3uujh0Qnsn0GRcKg74sS80S3d-oS136y_UuN6Zqb_U8Rt_DgxcHqZNL9E2rAu5PXQPw4huWvVEt9SrgcqgXPSVyneeAdE5Fvw4XDB-qpHYVnY8lAHHxiPvr6/s1600/HumanHeartDiagram.jpg Author unknown (Date unknown) This diagram of the heart is shown from in the front. So the  right  side is shown on the  left. The  left  side is on the  right  side of the diagram. The heart has four chambers. The two  atria  gather the blood. The two ventricles  pump blood out of the heart. Valves  stop the blood from flowing backwards. The  septum  splits the two sides of the heart. The right side of the heart pumps  de-oxygenated  blood to the lungs to pick up oxygen. The left side of the heart pumps the oxygenated  blood from the lungs around the rest of the body. Blood Vessels: There are three different types of blood vessel: Arteries Arteries transport oxygenated blood from the heart, except from the pulmonary artery which goes to the lungs where the blood would be deoxygenated. Arteries have thick muscular walls and have small lumen and they contain blood which is under high pressure. Veins Veins transport blood to the heart which is always de-oxygenated except the pulmonary vein which goes from the lungs to the heart where the blood would be oxygenated. Veins have thin walls and larger lumen and they contain blood which is under low pressure. Veins also have valves to stop blood from flowing backwards. Capillaries Capillaries are located in the lungs and muscles, when capillaries are looked at under a microscope they are one cell thick, blood is of very low pressure. The capillaries are where oxygen passes through the capillary wall into the tissues and where carbon dioxide passes from tissues in to the blood. Blood: Animal organisms cant survive without blood. Without blood, organs wouldnt get oxygen and nutrients that they need to live; animals wouldnt be able to keep warm or cool down, fight infections, or get rid of waste products. Without enough blood, animals would weaken and die. The circulatory system works carefully with other systems in animal organisms. It delivers oxygen and nutrients to organisms by working with the respiratory system. The circulatory system assists carrying waste and carbon dioxide out of the organism. The circulatory system also has its part in fighting disease in carrying specialised cells which are made in the organs of the immune system. The circulatory system is responsible for the transportation of hormones. Hormones control vast amount of things such as growth, the reproductive cycle and glucose metabolism. Hormones are produced in one part of the body, such as the brain or the liver, and then must be moved to another part of the body by the circulatory system for them to transport their message. The circulatory systems other main role is to regulate body temperature, if body temperature rises then blood vessels close to the skin increase in size so that more heat is directed in to the air and vice versa if body temperature drops the blood vessels decrease in size so the heat will retain in the body. Factors which can influence transportation and circulation in animals High blood pressure (Essential hypertension) where there is no specific cause. High blood pressure of a known cause (secondary hypertension). Low fluid volume which will also include low blood pressure. Low cardiac output. (Î’-Adrenoreceptor antagonists). Obstruct membrane changes and cardiac output, will cause widening of the blood vessels. Aneurysms, where there is weakening in the artery walls, mainly the aorta. Arteriosclerosis is where the artery walls are hardening and thickening: loss of elasticity which is part of aging. Atherosclerosis which is the process in the progression of plaques in the lumen which is located in blood vessels.   All of these may also be influenced by physiological factors for e.g. diet, exercise, disease, drugs or alcohol, obesity and excess weight. Control mechanisms in animals Self-regulating mechanisms, where biological systems try to uphold stable internal conditions e.g., blood pressure and body temperature, when there are changes in the external environment. Internal environment of any living organism was upheld constant within certain restrictions. Homeostasis is usually achieved through two types of regulating systems: on-off control and feedback control.  Hormones  often play a main role in keeping homeostatic constancy.  Homeostasis is carried out around the whole body; reaches every cell up to organs and systems. Enzymes could not work properly, which means nothing could operate correctly if there is not a constant internal environment this would mean the living organism would die. Every single cell is bathed in a watery solution, which is made by some blood plasma which is allowed to escape out of blood. This will carry away any waste back into the blood. The balance in tissue fluid is vital for the cells and the organism.  There are six things that must be controlled in an organism for good health: Carbon dioxide Additional carbon dioxide must be taken away or else the body becomes too acidic. Carbon dioxide is mainly lost in the air we breathe out, but a minor amount is lost in the urine. Urea Urea is poisonous and must be removed from the organism; this chemical is made when amino acids are digested in the liver. This is a waste chemical and is mainly removed through urine and sweat. Ions Cells can end up swollen, shrivelled or sometimes burst, if the right balance is not kept in ions. Sodium, potassium, hydrogen and phosphate are important ions. These are controlled through how much water is drunk by the organism; some are lost like sodium ions, through faeces and sweat. Sugar There has to be enough glucose for respiration and satisfactory stores of glycogen. When blood glucose levels fall too low the organism will die. Water 70% of body mass is water. Not keeping the right amount of water the organism would die. Temperature Enzymes that control all the chemical reactions in an organism work best at the temperature of approx. 37 degrees centigrade, if the organism was to get too hot or too cold the enzymes would die concluding in the organism to die.

The Dead Essay -- Essays Papers

The Dead 1) Symbolic meaning of snow†¦ a. Beginning when first enters Aunts house (warmth) he is out of the snow = coldness, isolation and inhumanity. But when enters the home he is surrounded with warmth and acceptance. Pages 10-11 b. Page 25 Gabriel was nervous about presenting his speech and sought comfort at a window. Looking outside at the falling snow, Gabriel he received a form of release, escape and feeling that he is unknown. c. At the end of the story, when Gabriel is with his wife Gretta, snow symbolizes a â€Å"new awareness†. He realizes that he looks too heavily upon himself and should look towards others and become more compassionate. 2) Characteristics of Gabriel†¦. a. Pages 12-13 When contemplating speech he considers changing it because he feels that nobody... The Dead Essay -- Essays Papers The Dead 1) Symbolic meaning of snow†¦ a. Beginning when first enters Aunts house (warmth) he is out of the snow = coldness, isolation and inhumanity. But when enters the home he is surrounded with warmth and acceptance. Pages 10-11 b. Page 25 Gabriel was nervous about presenting his speech and sought comfort at a window. Looking outside at the falling snow, Gabriel he received a form of release, escape and feeling that he is unknown. c. At the end of the story, when Gabriel is with his wife Gretta, snow symbolizes a â€Å"new awareness†. He realizes that he looks too heavily upon himself and should look towards others and become more compassionate. 2) Characteristics of Gabriel†¦. a. Pages 12-13 When contemplating speech he considers changing it because he feels that nobody...

Determining Activation Energy

Activation energy of a reaction Mengyuan Wu IB Chem HL Richard Forster March 20, 2013 Introduction: In this experiment, a reduction of peroxodisulphate (VI) ions by iodine ions is investigated. Solution of 10cm3 of K2S2O8, potassium peroxodisulphate, represented as ‘Solution A’. Mixture of 5cm3 of KI (Potassium iodide solution), and 5 cm3 of Na2S2O3 (sodium thiosulphate solution), and 2. 5cm3 of starch solution is considered as ‘Solution B’.Solution A and B are mixed together under different temperatures to show a â€Å"clock† reaction. Observation: Table 1: Raw Quantitative Data of Temperature and Time from the Experiment Fixed / Ideal Temperature ( °C)| Temperature of Solution A ( °C ±0. 5 °C)| Temperature of Solution B ( °C ±0. 5 °C)| Time Taken| Time Proceeded (seconds ±1 seconds)| 30| 31. 0| 31. 0| 3:10:34| 191| 35| 36. 0| 33. 5| 2:11:83| 132| 40| 40. 0| 38. 0| 1:37:24| 97| 45| 46. 0| 45. 5| 1:12:83| 73| 50| 51. 0| 51. 0| 0:52:40| 53| Qualitative:Before: Solution A: clear colorless solutions; Solution B: clear colorless solution During: Both solution A and B reached (or close to) a fixed temperature and mixed together form a clear colorless solution reaction time: one or few section of the solution turned clear light purple opaque purple, then the section expand to the entire solution speedily within a second the purple opaque solution gradually turn to a darker purple color After: Dark purple-black colored opaque solution Processing and Presenting Data:Table 2: Uncertainty of the Apparatus Used in the Experiment Equipment| Uncertainty| Explanation| Stopwatch| Seconds ±1 second| The actual uncertainty of the stopwatch is millisecond, shown in the column ‘Time Taken’ in Table 1. However, there are human reaction uncertainties when receiving the change in color in the actual experiment, so that particular uncertainty is presented by  ±1 second| 50cm3 Burette for K2S2O8, KI, and Na2S2O3| cm3 ±0. 02cm30. 02% for each solution| Initial Reading ( ±0. 1cm3) + Final reading ( ±0. 1cm3) = volume used ( ±0. cm3) for every solution measured in mixture A or B| 10mL Measuring Cylinder for starch solution| mL ±0. 2mL| | Thermometer|  °C ±1. 0 °C| Mixture A and B both have separate (but relatively close) temperature with uncertainty of  ±0. 5 °C each, after the average of the two the uncertainty doubles| Table 3: Processed date for temperature and time Average Temperature of the reaction ( °C ±1. 0 °C)| Proceed Temperature (K ±1. 0K)| Time Proceeded (seconds ±1 seconds)| 31. 0| 304. 0| 191| 35. 0| 308. 0| 132| 39. 0| 312. 0| 97| 46. 0| 319. 0| 73| 51. 0| 324. 0| 53|Table 4: Processed data for Graphing ln 1t (3 sig fig)| 1T (K)(4 sig fig)| -5. 25| 0. 003289| -4. 88| 0. 003246| -4. 57| 0. 003205| -4. 29| 0. 003134| -3. 97| 0. 003086| ln 1t=lnK (Proportional) t= Time T= Temperature (in K) Graph1: Calculation: Values: Table 4: Calculation to Process Temperat ure: | | Calculation 1: Average Temperature ( °C ±1. 0 °C)| Calculation 2: Temperature in K (K ±1. 0K)| | Formula| Temp. of A+Temp. of B2| Temp. in  °C+273| Fixed / Ideal Temperature ( °C)| 30| 31. 0+31. 02=31. 0| 31. 0+273=304. 0| | 35| 36. 0+33. 52=34. 75? 35. 0| 35. +273=308. 0| | 40| 40. 0+38. 02=39. 0| 39. 0+273=312. 0| | 45| 46. 0+45. 52=45. 75? 46. 0| 46. 0+273=319. 0| | 50| 51. 0+51. 02=51. 0| 51. 0+273=324. 0| Table 5: Calculation for Graphing Data | Calculation 3:ln 1t| Calculation 4:1T(K)| Fixed / Ideal Temperature ( °C)| 30| ln1191? -5. 25| 1304? 0. 003289| | 35| ln1132? -4. 88| 1308? 0. 003246| | 40| ln197? -4. 57| 1312? 0. 003205| | 45| ln173? -4. 29| 1319? 0. 003134| | 50| ln153? -3. 97| 1324? 0. 003086| Calculation 5 (Activation Energy): lnk= -EaR ? 1T+lnA y = m(slope) x + c R=8. 314 Jmol-1K-1(Diploma)Data from Graph 1: y = -6045. 3x + 14. 705 -6045. 3 = -EaR Ea=8. 314 ? 6045. 3 =50260. 6242 J =50. 2606242 KJ Random Errors: Calculation 6: (%Random Error for Average Temperature of the Reaction) Average temperature of the reaction K  ± 1. 0 K (Refer to Table 2) % Error=1. 0304. 0+1. 0308. 0+1. 0312. 0+1. 0319. 0+1. 0324. 0? 100 ? 1. 596% Calculation 7: (%Random Error for Time) Time Taken Seconds  ± 1 Second (estimated human reaction time) (Refer to Table 2) % Error=1191+1132+197+173+153? 100? 5. 569% Calculation 8: (% Random Error for Solutions) Random Error for K2S2O8+KI+ Na2S2O3+Starch 0. 02%? 3+0. 22. 5? 100 ? 8. 06% Calculation 8: (Total % Random Error) % Error=1. 596%+5. 569%+8. 06% =15. 225%=20% (one sig. fig. ) Final Answer: Calculation 9: (Final Answer) 50. 2606242 KJ  ±20% 50. 2606242 KJ =50. 3 KJ (3 sig. fig. >smallest sig. fig. in calculation) 50. 2606242 KJ? 0. 2? 10. 052 KJ=10KJ (one sig. fig. ) Experimental Result: 50. 3 KJ  ±10KJ 50. 3 KJ  ±20% Work Cited: Diploma Programme Chemistry Data Booklet. 2nd ed. Cardiff: International Baccalaureate Organization, 2008. 6. Print.

The Causes And Effects Of The Civil War - 1564 Words

The causes and effects of the Civil War will be defined through the institution of slavery, the Kansas-Nebraska Act, and the military leadership of President Lincoln to resolve the uncompromising political position of the South/Confederacy. Lincoln’s â€Å"House Divided† speech will be an important primary source that defines the underlying resistance to the expansion of the slave states into new territories taken by the U.S. government in the 1850s. More so, the uncompromising and an increasingly militaristic aggression of the South in seceding from the Union defines the effects of this political â€Å"divide† between Republicans and Democrats in Congress due to the Kansas-Nebraska Act of 1854. At the center of this issue, Lincoln’s leadership defines the slow process of political causality in opposing slave state status, which eventually manifested itself into a â€Å"house divided† in the Civil War. In essence, the root cause of the Civil War wil l be defined through the tension between slave and free state status, the Kansas-Nebraska Act, and the important pro-northern leadership of Lincoln in the coming war that would divide the nation. One of the causes of the political tension between northern â€Å"free states† and southern â€Å"slave states† was the issue of westward expansion. New territories, such as Kansas and Nebraska, defined attempted compromises that were meant to evenly divide these territories between the two factions. Therefore, the institution of slavery was a moral, ethicalShow MoreRelatedThe Causes And Effects Of The American Civil War1815 Words   |  8 PagesJames T. Vaughn Correctional Center September 9, 2014 The Causes and Effects of the American Civil War State Standard: H.4.A In 1860, Abraham Lincoln, a member of the anti-slavery Republican Party, was elected President of the United States (Hassler). 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