Flow of Blood In The Heart
Cardiovascular & Respiratory Systems PT 1 Assignment Overview Please prepare a 2 to 3 page paper in which you discuss the flow of blood through the heart, and vascular system. Please be certain to include a discussion of: 1. The chambers and valves of the heart and their function. 2. The function of the major arteries and veins of the heart in the maintainance of blood flow. Be sure to include a discussion of the superior and inferior vena cava, aorta, pulmonary artery and vein, and coronary artery and vein. 3. Discuss the causes of plaque build-up in coronary arteries and the implications of high cholesterol for the heart and circulation of blood. I want everyone to succeed in this course and am going to provide you with step-by-step instructions to help you achieve the highest possible grade on your paper. One of the major issues that I have come across is receiving papers from students that don’t meet the criteria for full points to be awarded. The major reason for this is failure to adequately address all of the stated objectives to the appropriate degree of a given assignment. A great way to overcome this problem is to begin your paper by examining the “weight” of each part of your paper. In each assignment, look to see how points are distributed AND what areas must be covered in your paper. I require the use of headings and sub-headings for your paper to organize the content. This helps to determine if all the criteria have been addressed and demonstrates the flow and organization of the content. Generally, APA Levels 1 and 3 are sufficient. For example: Let us assume that you are given instructions to write a 2 page paper. Imagine that there are 4 areas (or objectives or instructions), each worth 25% of your papers overall grade. You should make certain that your paper covers each topic equally. Here is an example: Cover Page (cover pages are required for ALL written academic work) Introduction Objective/instruction 1 (1/2 page) Objective/instruction 2 (1/2 page) Objective/instruction 3 (1/2 page) Objective/instruction 4 (1/2 page) Conclusion References References and Plagiarism For many of you, this may be your first academic course in quite some time. If this is the case, I encourage you to spend some time familiarizing yourself with the information found in the syllabus page. Please be certain that ALL submitted papers include a reference sheet. Remember that all sources used in the creation of your paper must be cited in your paper. Whenever you use the work of another, be it directly (taking actual direct quote from their work) or indirectly (putting their ideas into your own words), you need to cite in the text where you used their work. Academic work should also not look like a “ransom” note. 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Flow of Blood In The Heart
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The Cardiovascular system consists of the human heart and the circulatory system. The heart mainly works as a pump that thrusts blood to the tissues, cells and all organs in the body. Blood mainly transports nutrients and oxygen to all the cells and eliminate waste products and carbon dioxide that is made by those cells. Blood is therefore carried to other body parts from the heart through a very composite system of arterioles, capillaries and most importantly the arteries .It is taken back to the heart via veins and venules. Scientists have proven that if all the vessels in your body network are laid end to end, they would broaden for about 96,500 kilometers which is enough to cover the earth more than twice.(Ingels,2008)
Chambers of the Heart
The heart has four chambers, two ventricles and two atria which are the lower and upper chambers respectively. The atria are considered to be about a third the size of the ventricle. The left ventricle is the largest heart chamber which consists at least three times the muscle in the right ventricle. It occupies a major part of the heart’s apex. The right atrium obtains deoxygenated blood from the inferior and superior vena cava as well as the coronary sinus, and propels it into the right ventricle through the tricuspid valve. Once the right ventricle receives blood without oxygen from the right atrium, it pumps it into the pulmonary artery (left atrium) via the pulmonary valve and pulmonary trunk. The left atrium gets blood with oxygen from the pulmonary veins, and then thrusts it to the left ventricle, through the atrioventricular valve. The left atrium is very important since one of its main functions is to influence the rate of the heart. Finally the left ventricle receives blood rich in oxygen from the left atrium through the mitral valve, and thrusts it into the aorta via the aortic valve. The heart’s chambers therefore provide a pathway for the blood to be sent to the lungs for oxygen and then distributed to the body cells to maintain life in the body.(Porth,2009)
Valves in the heart.
The heart valves act as inlets for blood coming and leaving the ventricles. Every valve in the heart has three flaps apart from the mitral valve that contains two flaps. There are four valves in the heart that include; the pulmonary valve connecting the pulmonary artery and the right ventricle, Tricuspid valve connectin...