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BLOOD VESSELS, CHAMBERS & VALVES
CIRCULATION OF BLOOD
WORKSHEET
When you think about how blood circulates around the body you should think about the blood vessels, chambers and valves which operate in the process as blood circulates around the body.
It may help you to ‘visualise a drop’ of blood starting at a specific point in the heart and making one complete cycle of the body and arriving back where it began. This complete cycle takes approximately 30 seconds.
BLOOD VESSELS
· A0RTA · PULMONARY ARTERY · PULMONARY VEIN · CORONARY ARTERIES · SUPERIOR VENA CAVA · INFERIOR VENA CAVA
CHAMBERS OF THE HEART
· RIGHT ATRIUM · RIGHT VENTRICLE · LEFT ATRIUM · LEFT VENTRICLE
VALVES IN THE HEART
· TRICUSPID VALVE · PULMONARY VALVE · BICUSPID VALVE (MITRAL VALVE) · AORTIC VALVE
The heart has been described as being a pump, when in fact it is actually a double pump. The explanation being that the right handside of the heart pumps deoxygenated blood to the lungs via the pulmonary artery (please note deoxygenated blood in an artery) artery and is referred to as Pulmonary Circulation.
The left handside of the heart brings oxygenated blood back from the lungs via the pulmonary vein (please note oxygenated blood in a vein) and pumps the blood via the aorta around the body to the ‘body tissues’ and is called Systemic Circulation. REARRANGE THE FOLLOWING PHRASES TO SHOW BLOOD TRAVELLING THROUGH ONE CYCLE OF THE BODY CIRCULATORY SYSTEM Make the assumption that the drop of blood starts its journey in the ‘Right Atrium’
1. Enters the aorta. 2. Enters Left Ventricle 3. Enters the Lungs 4. Travels back via the superior/inferior Vena Cava 5. Passes through the Tricuspid Valve 6. Finishes journey back at the Right Atrium 7. Enters Right Ventricle 8. Passes through the Bicuspid valve (Mitral Valve) 9. Enters the Pulmonary Artery 10. Enters the Left Atrium 11. Passes through the Aortic Valve 12. After leaving Aorta travels to all organs and tissues of the body. 13. Passes through the Pulmonary Valve 14. Enters Right Atrium THE CORRECT SEQUENCE OF BLOOD CIRCULATION DURING ONE COMPLETE CYCLE OF THE BODY
1. Enters Right Atrium 2. Passes through the Tricuspid Valve 3. Enters Right Ventricle 4. Passes through the Pulmonary Valve 5. Enters the Pulmonary Artery 6. Enters the Lungs 7. Enters the Left Atrium 8. Passes through the Bicuspid Valve (Mitral Valve) 9. Enters Left Ventricle 10. Passes through the Aortic Valve 11. Enters the aorta. 12. After leaving Aorta travels to all organs and tissues of the body. 13. Travels back via the superior/inferior Vena Cava 14. Finishes journey back at the Right Atrium دوشنبه 28 آذر 1390 :: 16:06 :: نویسنده : بهلول
Warmup Recovery Circuit 1) Groin Twists - (Ins and Outs) جمعه 11 آذر 1390 :: 03:47 :: نویسنده : بهلول
1- ترم اول کالج تمام شد. آناتومی و فیزیولوژی را باید re-assessment research ام درباره ی آنالیز تمام گلهای جام جهانی بود و تحقیق و تطبیق و تفاوت تعداد پاسها و طول پاسها و زمان بازی و رتبه تیم ها و انحصارات! بازیکنان و covering area !!!! سه ماه شبانه روز طول کشید تا حاصلش شد 300 کلمه مفید ! 2- روانشناسی ورزشی را شروع کرده ایم. چقدر جالبه ! مثلا دلایل اینکه چطور سر آلکس فرگوسن با تیمی گمنام مثل آبردین / 1981 قهرمان اروپا شده و رئال را در فینال 2-1 برده !!! 3- موبایلم شکسته n95 8 gigs ؛ پول ندارم برم آیفون فور اس! بخرم! سیم کارت ام هم لاک شد . نور علی نور! 4- موسیقی فعلا حرام و تعطیل !! خانه ام شده هیئت عزاداران شمیرانات ! همه اش نوحه ی لری و سلیم موذن زاده و دیگر مداحان ؛ همسایه ها عاصی شده اند!! 5- " حضرت عشق " آجیل و لواشک و گردو و سوهان عسلی دست ساز! مفصلی فرستاده !! نوش جان می کنم و عطر وطن را استشمام....... 6- گور پدر هر چی سیاست و کنسول گری و بمب اتم و سفارت و استکبار و خودجوش و !!!!!! مرگ بر جنگ ....... هنوز یاد اون دردهای 8 سال مقدس لعنتی ؛ تنم را می لرزاند. آقا ما ملت بدبخت ایران ؛ اگه دلمان نه انرژی هسته ایی بخواهد و نه سربلندی امت همیشه در صحنه را و نه دلسوزی امریکا و انگلیس برای حقوق بشر کوفتی پایمال شده ی مان و نه دموکراسی و مدرنیزاسیون را ؛ کی را باید در این دنیا ببینیم ؟ ای لعنت به تمام تریبونهای شرق و غرب و وسط !! 7- فردا فستیوال فوتبال مدارس ابتدایی است. مربی ها باید با لباس کامل ورزشی و کلاه سانتا = پاپا نوئل برویم سر زمین !!! فک کنید قیافه ی منو با ریش نزده بخاطر محرم و کلاه قرمز! 8- دیروز بارانی بارید وسط تمرین بچه ها , طوفان نوح !! 105 تا بچه زیر 8 تا 14 سال در کلاسم دارم . 18 ملیت مختلف 12 زبان مختلف 9 مذهب متفاوت و هزاران فرهنگ جورواجور اومدم بخاطر health & safety تعطیل کنم . دو سه تا به گریه افتادند که : کجا برویم ؟ تنها دلخوشی مان همین تمرین و بازی با توپ است. یاد زنگ ورزش های خودمون تو زمستون افتادم و بداخلاقی های معلم ها. ادامه دادیم زیر اون بمباران آبکی خداوند ؛ انگار شینلگ گرفته بود روی سرمان از آسمانش! تا ساعت 9 شب دویدند و فریاد زدند و بازی کردند! یکشنبه 6 آذر 1390 :: 18:06 :: نویسنده : بهلول
Doing a literature review This Advice Sheet introduces you to the basics of compiling a Literature review. What is a literature review? • It is a critical and evaluative account of what has been published on a chosen research topic. • Its purpose is to summarise, synthesise and analyse the arguments of others. (It is not an academic research paper, the main purpose of which is to support your own argument.) • You should describe and analyse the knowledge that exists and what gaps occur in research related to your field of interest. (This should clarify the relationship between your own research and the work that has previously been done.) • It should reveal similarities and differences, consistencies and inconsistencies and controversies in previous research. What it is not It is not primarily an argument for the importance of what it is you are researching. While it is necessary to explain what is the primary purpose of your research, the reader of a literature review will assume that the need for undertaking the research has already been established. It is not a descriptive list of papers or summaries. You must not just list your sources and describe them in detail one at a time. A literature review is organised around ideas, not the sources themselves as an annotated bibliography would be organised. You should assess previous studies and discuss their strengths and weaknesses. You also have to think about which themes and issues your sources have in common. Who should you ask? It may not be possible to survey every person who could provide a useful response to your questionnaire. In such cases, you will need to choose a sample from your population to survey. What is a literature review? 1 What it is not …. 1 Approaches needed …. 1 Approaching your review …. 2 Writing the review …. 3 Further reading …. 4 The approaches needed for different disciplines It is important to note that certain disciplines will have a different approach to literature reviews. Your department may have particular preferences so you should always make sure that you have consulted your supervisor before you start work. • Science and engineering have fairly rigid conventions for reporting on research. They can have a specific structure e.g. “introduction”, “background” followed by “methodology” “results” and “discussion”. This is known as an explicit literature review. • Social science literature reviews often follow a similar pattern to science and engineering literature reviews although some social sciences e.g. anthropology may have a less explicit approach. 2 Approaching your literature review There are five stages to your literature review: 1. Find models 2. Problem formulation – which topic is under consideration and what are the constituent issues? 3. Literature search 4. Evaluation of findings 5. Analysis and interpretation of literature 1 Find models Look for other literature reviews in your discipline and read them to get an idea of the types of themes you might want to include in your research or ways in which you could organise your final review. You can do a database search to find models – put the words “literature review” along with your keywords to retrieve references to articles of this type 2 Problem formulation You should try to construct a working statement that will form the basis of your literature review. The statement does not have to argue for a position or an opinion. It will rather argue for a particular slant on the material. 3 Literature search The literature search will help you identify scope and key issues. Efficient searching will help you: • Identify which authors are interested in your specialism and those who take a generalist’s view. • Trace authors who are prominent in your subject and who can help you justify the importance of your research idea. • Include the authors would or could contradict your ideas. 4 Evaluation of findings Reading research articles is different from other types of reading. You must develop a good understanding of the research literature to be able to write a competent literature review. Understanding the literature requires you to read, re-read and assimilate complex ideas. Read the easier articles first Difficult or badly written articles will probably be easier to understand if you read them last when you have gained familiarity with your subject. • Political science literature reviews may have to include a section which establishes basic premises and has definitions of certain terms and models. • Literary and historical literature reviews do not have a single convention. In contemporary literary studies an “explicit” chapter may not be needed. The researcher may be taking a new theoretical approach to material which has already been studied before. 3 Scan the article For the preliminary scan, don’t read the articles closely so as to avoid getting mired in detail. It may help to note down the key points for each article. When reading you should keep the following in mind: • What are the authors’ academic reputation? • Identify the research question and the specific hypotheses, the findings and how the findings were interpreted. • Are the authors objective or does their work appear to have a particular bias? • Is contrary data considered and discussed or is it ignored? 5 Analysis and interpretation of the literature After you have an idea of the main ideas in each article, identify the precise methods used and the theories tested. When you are comparing the work of a number of researchers some of whom have a different take on the problems of the research question, you will need to have an in-depth understanding of their work. A close reading may reveal differences in theoretical outlook. How do different authors cite the same work?. One author may explain the method of an earlier study, describe its results in great detail and cite it repeatedly while Another may give it only a passing reference. Allow enough time Before you can write about your research project you must have evaluated the existing literature properly so do allow yourself sufficient time to do this. Writing the Literature Review Number of articles reviewed Published review articles may contain more than a hundred studies. You may wish to consult your supervisor about how far you should go back in time and how many articles you want to include. Organisation There are a number of different approaches to organising a literature review so again do consult your supervisor before beginning the work. You could use the following method: • Introduce your research question (what it is, why it is worth examining) • Narrow research question to the studies discussed • Briefly outline the organisation of the paper. If there is a major controversy, describe it and explain that you will present research supporting one side and then the other. • Or, if three methodologies have been used to address a question, briefly describe them and say that you will compare the results obtained by the three methods • Describe studies in detail • Compare and evaluate studies • Discuss the implications of the studies and how you intend to build on them Conclusion/Recommendations Discuss what you have learned from reviewing literature so far and where the research lead? After reading your review your reader should be convinced that your proposed research project will play a necessary role in furthering knowledge in your field. 4 Further reading A link to books on literature searching can be found at:- http://www.lboro.ac.uk/library/skills/literature-search.html You may also wish to consult your Academic Librarian if you are having trouble locating literature on your topic. See http://www.lboro.ac.uk/library/about/StaffList.html for details. ادامه مطلب ... سه شنبه 26 مهر 1390 :: 16:24 :: نویسنده : بهلول
Dynamic Warm Up Routines for Sports by Adrian Faccioni Date Released : 03 Apr 2001 Whilst the warm up for participation in any sporting or exercise activity is accepted as being essential for minimising injuries and improving performance, the methods by which many sports attempt to achieve this are less than ideal. The warm up method used by many dynamic sports (both team and individual) usually includes an initial jog around the field or court, followed by 10- 15 minutes of static stretching. This is then followed by a few drills, and the athletes then begin their training session or game. Whilst the basis behind this methods may appear to be the sound application of current training principles, a closer analysis reveals major limitations with this method of preparing an athlete for a dynamic sport activity. The main physiological reason for a warm up include: To increase core temperature (an increase in rectal temperature of a least one to two degree Celsius appears to be sufficient) (deVries 1980) To increase heart rate and blood flow to skeletal tissues, (Karvonen 1978) which improves the efficiency of oxygen uptake and transport (deVries 1980), carbon dioxide removal (Karvonen 1978), and removal and breakdown of anaerobic byproducts (lactate) (Karvonen 1978) To increase the activation of the Central Nervous System (therefore increasing co-ordination, skill accuracy and reaction time) (Hill 1927 cited in Shellock and Prentice 1985, deVries 1980) To increase the rate and force of muscle contraction and contractile mechanical efficiency (through increased muscle temperature) (Bergh 1980 and deVries 1980) To increase the suppleness of connective tissue (resulting in less incidence of musculotendonous injuries) (Lehmann et al 1970, Sapega et al 1981). The result of the above responses lead to an athlete's increased ability to do physical work (Bergh & Ekblom 1979), which is extremely important for sports requiring short duration high intensity work bursts such as sprinting and jumping (Bergh 1980, Karvonen 1978). The improvement in the nervous system is especially helpful for athletes involved in sports that demand high levels of complete body movement, such as team sport athletes. The major criticism against the "TYPICAL WARM UP' is that it does not adequately prepare the athletes for the demands placed upon them in the ensuring session. Generally the initial jog is at a pace that has a minimal effect upon body temperature, and usually consists of jogging forwards, and in a straight line. The stretching performed is usually that of static stretching, with most stretches performed slowly and with the athletes either standing still or sitting on the ground. This method of stretching has been shown to be beneficial for the increase in limb range of motion (Beaulieu 1981, Sapega et al 1981, Shellock & Prentice 1985, Taylor et al 1990), and aims to relax the muscles so that they are less resistant to passive stress for stretching. But this type of stretching does not prepare the muscle and connective tissue for the active contraction - relaxation process that will occur with any running, jumping or kicking movements as required in a dynamic sport training or game situation. During this stretching period (typically from 5 – 20 minutes), the body is very efficient in removing excess body heat, so the small increase in body temperature from the initial jog is quickly lost if the athlete does nothing but statically stretch for this time. This is even more prevalent in cold climates or cold seasons (Autumn & Winter) which is when many team sport competitions are held. Many injuries occur at the beginning of a competition due largely to an inadequate preparation for the activity (Lehmann et al 1970, Sapega et al 1981). A poor warm-up can be one factor to be blamed for such injuries occurring, and can easily be corrected with a modification to warm-up procedures by the athletes involved. Inadequate warming up can lead to less than optimal speed and skill levels that could result in quick scoring by the opposing team or individual early in the game leading then to athletes having to catch up placing more pressure on the player(s) involved. To make changes to the way a warm-up is performed, the aim of the warm-up for a dynamic sport should be altered, such that the warm-up should be: The complete physical and mental preparation for the dynamic actions to follow. The athlete should be able to begin the game or training session totally ready to perform at maximal intensity if required. The alternative warm-up procedures that I am suggesting is a variation of the above traditional method. With more active jogging and dynamic stretching techniques, the athlete will be better prepared for the ensuring session or game. In training situations the athlete will spend less time in the warm-up phase therefore allowing more time for the main body of the session where all the learning takes place. The initial jog is now replaced with a more dynamic series of running exercises that include regular alternation of running forwards, backwards, sideways, high knee drills, butt flicks, crossovers, bounding, jumps and progressive sprints. This component will only take 2-4 minutes depending on the climate. It is expected that the athletes are breathing quite heavily at the end of this short series of exercises. With the stretching component, static stretching can still be included in the program, as many athletes still feel they need some static stretching to really prepare themselves (with time it would be ideal to phase static stretching out of the warm up routine and place it only in the warm down period). One muscle group is stretched between each run or drill, Eg. the hamstring group, and the athletes are given approximately 30 seconds to stretch both hamstrings statically (this also has the affect of decreasing talk time between athletes which can be a major time waster, especially with younger athletes). The athletes are then directed to perform another dynamic activity, either an easy run-through or if running drills have been taught, they perform variations of skipping and running drills and butt kick drills. A warmup sequence for athletes who feel they need to statically stretch could be as follows: Jog forward, backwards, sideways, etc. Bounds and jumps Static stretch of hamstring group (30 seconds) Run-through (forwards and backwards) or running drills (A's, B's etc) Static stretch of quadriceps group (30 seconds) Run-throughs/drills (higher intensity) Stretch adductors (groin) (30 seconds) Run-throughs/drills (higher intensity) Stretch calves (30 seconds) Run throughs/drills (near maximal) Stretch (athletes' choice) 100% intensity sprint ** Start of training session. Once the athlete has attained a mild sweat in normal ambient conditions, and is able to perform speed runs and drills at maximum (this process is progressive), the athlete should now be considered warmed up for the ensuring training session or game. The dynamic stretching component is very important for the specific preparation of the musculature to dynamic movements. Dynamic stretching is defined as repetitive contractions of an agonist muscle to produce quick stretches of the antagonistic muscle (Kurz 1990), so any active callisthenic movement can be classified as dynamic stretching (jumping, body rotations, bending, etc). This method very specifically prepares the muscle tissue for active muscle contraction and relaxation as required in a sporting situation. There is limited ability by this method to cause long-term increases in range of motion due to the limited time that a muscle is held in a stretch. This short stretching time is not long enough to allow time dependent stress relaxation to occur, leading to minimal flexibility improvements (Taylor et al 1990). Therefore it is important to include some static stretching in the warm down to continue to improve; joint range of motion (Beaulieu 198 1, Sapega et al 198 1, Shellock and Prentice 1985, Taylor et al 1990); removal waste products such as lactic acid (Bale and James 1991, deVrivs 1980); and to increase the athlete's rate of recovery (Mickelson and Hagerman 1978, Hagerman 198 1, Kamen 1984, Bale and James 1991). The total time for this type of warm up routine is approximately 5 - 15 minutes, with the athletes fully ready to perform as required by the coach at the end of this time. If compared to the many sports that have athletes warm up for 25+ minutes, this is a saving of approximately 5-20 minutes every session that could then be used for more work in the main body of the session. Assuming that due to an inadequate warm up the athlete takes another 10- 15 minutes to warm up properly during the main body of the training session there could be a saving of up to 25+ minutes per session. If the athlete trains 3 times per week for 40 weeks (a year of training) this could be a total increase in quality training time of 50-60 hours per year. Since one of the biggest limitations in coaching is the lack of time to develop all the attributes in the athletes you work with, to be able to add an extra 50-60 hours per year to the training program without adding any more sessions, may make the difference between your athletes achieving or not achieving the level of excellence that they and you as the coach are striving for. The key to this type of warm up is to make the dynamic portion of the warm UP progressive and ensure that the limbs are taken through at least the ranges of motion that will be required in the game situation. The time for static stretching is after the game or training situation as this leads to more rapid recovery for ensuing sessions. REFERENCES Bale, P. and James, H. 1991. Massage, warm-down and rest as recuperative measures after short term Intense exercise. Physiotherapy In Sport. 13:44. Reaulleu, JY_ 1981. Developing a stretching program. Phys. & Spts Med. 9:59-69. Bergh, V. & Ekbioni~ B. 1979. Physical performance and peak aerobic power at different body temperatures. J. Appl. Physiol. 46:885.889. Bergh, V. 1980. Human power at subnormal body temperatures. Acta Physiol Scand. 478. (suppi.):1-39. Blomstrand, E., Bergh, V, Essen-Gustausson, B. & Ekblom, B. 1984. Influence of low muscle temperature on muscle metabolism during Intense dynamic exercise. Acta. Physiol. Scand. 120:229-236. deVries, HA, 1980. Physiology of Exercise for Physical Education and Athletics Wilfiain C. Brown, Dubuque. Hagerman, F.C. 1981. Post-exercise pain. Oarsman, 13:14.17. Kamen, G. 1984. Stretch recovery patterns following exercise with an imposed myostatic stretch. Arch. Phys. Med. and Rehab. 65:178.181. Karvonen, J. 1978. Warming up and Its physiological effects. Acta Univer. sitatis Ouluensis. Series D. No. 31. Pharmacologica et physiologica. No. 6. Kurz, T. 1990. Stretching Scientifically. A Guide toFlexibility Training. Stadion Publishing. Cypress. Lchmann, JX, Masock, A.S, Warren, C.G. & Koblanski, Nj. 1970. Effect of therapeutic temperatures on tendon extensibility. Arch. of Phy. Med. & Rehab. 51:481-487. Mickelson, T. and Hagerman, F. 1978. Should you take the time for warm-up, warm-down? Oarsman. 10:15.19. Rigby, B. 1964. The effect of mechanical extension under the thermal stability of collagen. Biochim. Blophys. Acta. 79:634. 636. Sapega, A.A., Quedenfeld, T.C., Moyer, R.A. & Bulter, R.A. 1981. Biophysical factors in range-of-motion exercise. Phys. & Spts Med. 9:57-65. Shellock, F.G. & Prentice, WX. 1985. Warmup and stretching for Improved physical performance and prevention of sports-related injuries. Spts. Med.2:267. 278. Taylor, D.C., Dalton,J.D, Seaber, A.V. & Garrett Jr, W.E. 1990. Viscoelastic properties of muscle-tendon units: the biomechanical effects of stretching. Am. J. Spts. Med. 18:300-309. آخرین مطالب
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