The cardiovascular system consists of the heart‚ blood vessels‚ and blood. This system has three main functions: Transport of nutrients‚ oxygen‚ and hormones to cells throughout the body and removal of metabolic wastes (carbon dioxide‚ nitrogenous wastes). Atria: Ventricles: In a four-chambered heart‚ such as that in humans‚ there are two ventricles that operate in a double circulatory system: the right ventricle pumps blood into the pulmonary circulation to the lungs‚ and the left ventricle pumps
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Heart disease‚ strokes and high blood pressure The heart: Our heart is a vital organ; it is a super muscle which constantly pumps our blood around our body at a rate of 40 to 100 beats per minute for a lifetime. It never tires. The heart has two sides which are separated and each side has two chambers. Valves make sure blood can only flow in one direction. The right side receives de-oxygenated blood from the body through the vena cava and pumps it through the pulmonary artery to the lungs‚ and the
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The Arrow of Disease Many of the greatest tragedies throughout human history have been caused by lethal diseases such as smallpox‚ flu‚ tuberculosis‚ malaria‚ plague‚ measles‚ and cholera. They are all potentially infectious diseases that originated from viruses in animals. When Christopher Columbus and his successors invaded the Americas‚ the most potent‚ powerful‚ and deadly weapon they carried was their germs. In 1492‚ the European conquest of the Americas began with Columbus voyage. It was
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How things flow through the heart: • blood drains into the right atrium through the superior vena cava‚ inferior vena cava‚ and the coronary sinus (drains the heart muscle itself)→Right Ventricle→pulmonary semilunar valves→lungs→pulmonary veins→left atrium→bicuspid valve→left ventricle→aortic semilunar valve→systemic circuit. What the valves do: • Prevent backflow into the atria and ventricles‚ ensuring that blood only flows one way through the heart. what vessels bring blood to the heart and
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BMS 1515 Human Sciences - Reflective feedback/Feedforward Form – to be submitted with the final assignment Make this PAGE 1 of your assignment!! NAME: HAIDER SHEIKH STUDENT NUMBER: M00398469 What did you understand from the lecturer’s feedback comments on your formative lab report?- title was not illustrative enough‚ just a mere two words. - Abstract was superficial‚ not focussed upon the subject area and lacked specificity. - Abstract did not have aims‚ the origin of experiment and the
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Heart Disease By: John Palsson Heart diseases have emerged as a big problem today and the biggest contributor to this increment has been the increase in rate of obesity. Heart diseases are fatal and they can also impair the other parts of the body. Hence knowing about the problems and solutions related to heart diseases are vital as they can also help you to combat them and retain good health throughout your life. Information on these heart diseases is vital because knowing more about them can help
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Heart disease Introduction What is heart disease? Heart disease or Cardiovascular disease is an abnormal function of the heart or blood vessels. It can cause an increase in risk for heart attack‚ heart failure‚ sudden death‚ stroke and cardiac rhythm problems‚ thus resulting in decreased quality of life and decreased life expectancy. The causes of cardiovascular disease range from structural defects‚ to infection‚ inflammation‚ environment and genetics. In order to help prevent cardiovascular
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Blankenship Mrs. Smith 11 English AP 11 January 2011 Respiratory Diseases: Infections Invading the Lungs The average human takes breathing for granted. One might think that breathing is just an involuntary movement‚ but for the millions of people who suffer from respiratory illnesses‚ each and every breath is a major accomplishment to another day of daily life. The respiratory system not only oxygenates the blood for the body‚ but also filters out wastes‚ infections‚ and provides the air that
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range of shapes‚ ranging from spheres to rods and spirals. Bacteria are ubiquitous in every habitat on Earth‚ growing in soil‚ acidic hot springs‚ radioactive waste‚[2] water‚ and deep in the Earth’s crust‚ as well as in organic matter and the live bodies of plants and animals. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water; in all‚ there are approximately five nonillion (5×1030) bacteria on Earth‚[3] forming a biomass on
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there is a certain path that the blood follows through our body. The blood moves through pulmonary circulation and then continues on through systemic circulation. Pulmonary and systemic are the two circuits in the two-circuit system of higher animals with closed circulatory systems. As the heart pumps‚ blood is pushed through our body through the entire circulatory system. Oxygenated blood is pumped away from the heart to the rest of the body‚ while deoxygenated blood is pumped to the lungs where it
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