The Heart and Blood Circulation The heart is a four chambered muscular pump around the size of a fist. It beats about 100,000 times a day pumping around 2,000 gallons of blood through about 100,000 miles of organic tubing.
The heart is a big muscle with four valves connected together to make a two-stage pump. The heart gets its energy by oxidizing blood sugars. This released energy, contracts the heart’s many muscle cells, and the four chambers squeeze blood out into the arteries.
The arteries are thick walled muscular tubes which carry blood away from the heart. The heart has two sides - the left ventricle and the right ventricle. The artery from the right ventricle pumps blood to
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The venae cavae collects oxygen depleted blood from the body and routes the blood to the right atrium in the heart. When the right atrium squeezes, it pushes blood through the tricuspid valve into the right ventricle. Like the other three heart valves this is a one way valve (blood can only flow in one direction). When the right ventricle contracts, it pushes blood through the pulmonary valve and on into the lungs. Because it does not take much pressure to get blood to the lungs and back, the right side is smaller than the left. The left side has to work harder pumping blood to the rest of the body. Blood in our arteries is at a high pressure, blood in our veins is at low pressure. The blood, rich in oxygen, returns from the lungs through the pulmonary veins into the left atrium. To get all the way round blood has to go through the heart twice and this is why it is called a double circulation.
Blood contains red blood cells, white blood cells and platelets floating in a liquid called plasma. The red blood cells contain haemoglobin and carry oxygen. Haemoglobin is a protein which becomes oxyhaemoglobin in the lungs. The white blood cells fight disease by making antibodies and fighting germs.
Blood transports these vital materials around the body. Blood plasma contains nutrients, hormones and waste products. Oxygen is carried
Capingana, D. P., Magalhaes, P., Silca, A. T., Goncalves, M. A., Baldo, M. P., Rodrigues, S. L. (2013). Prevalence of cardiovascular risk factors and socioeconomic level among public-sector workers in Angola. BMC Public Health, 13(1), 1-9. Doi: 10.1186/1471-2458-13-732
The cardiovascular system, which consists of the heart and blood vessels, is the circulatory systems in our body. The major function of the system is transportation; the heart is the system pump and the blood vessels are the delivery routes. The heart transport respiratory gases, nutrients, wastes, and other substances vital to the body’s homeostasis to and from the cells by using the blood as a medium.
Composed of the heart, blood vessels, and blood, the cardiovascular system is the body system that carries out the tasks of pumping and transporting blood, oxygen, nutrients, and waste products, and other substances throughout the body.
You need to explain to him the s/s of blood clotting (since he may have too low an INR d/t treatment and he needs to know this). Explain that his a-fib puts him at risk for blood clots.
R E V I E W S H E E T 30 Anatomy of the Heart
1.The fluid surrounding tissue cells is called? interstitial fluid.2.What are the functions performed by the circulatory system?-The circulatory system supplies oxygen and nutrients to our body by working with the respiratory system.- It also helps carry waste and carbon dioxide out of the body3.What is the fluid type that holds many of the human body fluids? Intracellular fluid4. Name fluids that are nearly identical in content except for proteins. Plasma and interstitial fluids.5.What function of blood is most critical to life on a second to second basis? Blood Regulation6.What fluid has the highest concentration of proteins? Intracellular fluids7.What is the most prevalent positive ion in interstitial fluids? Sodium8.What is the principal
The heart, blood and blood vessels make up the basis of the cardiovascular system also known as the circulatory system. The average human body contains approximately 5 litres of blood which is carried around the body via a network of blood vessels split into three types; arteries, veins and capillaries. The arteries are the largest of the three vessels and carry blood away from the heart. Veins carry blood to the heart and are smaller than arteries, then finally the smallest vessels known as capillaries distribute the oxygen rich blood to organs whilst simultaneously picking up the waste carbon dioxide and water from the organs to transport back to the heart where it can be pumped into the lungs to be exhaled.
"A Simple Heart" had been written in 1887. Except for the environment, the objectification of women, relegated to a mere source of males' satisfaction, as depicted in these verses, is still a plague. Yes, a plague. We are beaten, humiliated, brutalized daily, in every part of the planet.. I can quote personal experience, but I am not going to bother you. I would like to know why a woman free of express herself is not considered a "wedding commodity"? Hypocrites! Scraping the bottom of the barrel is a typical male
Select appropriate tools to collect, record, analyze, and evaluate data. Make directional hypotheses that specify what happens to a dependent variable when an independent variable is manipulated.
One source of great mortality and morbidity in Europe and North America is the cardiovascular disease, Atherosclerosis. It is recognized as a chronic inflammatory disease of the intermediate and large arteries characterized by the thickening of the arterial wall and is the primary cause of coronary and cerebrovascular heart disease (Wilson, 2005). It accounts for 4.35 million deaths in Europe and 35% death in the UK each year. Mortality rate are generally higher in men than pre-menopausal woman. Past the menopause, a woman’s risk is similar to a man’s (George and Johnston, 2010). Clinical trials have confirmed that lipid accumulation, endothelial dysfunction, cell proliferation, inflammation matrix alteration and foam cell formation are
The cardiac cycle describes the coordinated and rhythmic series of muscular contractions associated with the normal heart beat.
This allows your cardiovascular centres in your brain a little bit more latitude as far as controlling your heart rate. If you were to remove a beating heart from someone's body you would find that the heart is no longer being suppressed by the parasympathetic nervous system and it will accelerate to the same pace as the sinoatrial node. The SA node generates action potentials approximately 100 times per minute due to the physiology of the heart, its own permeability to sodium and calcium via its channels, and a host of other things. Anywhere between 80 to 100 beats per minute is normal for the SA node.
veins to the tissues of the body. These walls do not let out blood but
From the very first time the heart starts pounding until the time of death, it may beat more than 3.5 billion times. The center of the circulatory system is the heart. The average heart beats 100,000 times each day, pushing around 2,000 gallons of blood throughout your body. With a life span of 70-90, the heart will beat two to three billion times and circulate 50-65 million gallons of blood.
Compare and contrasts the anatomy and physiology of blood vessels: arteries, veins and capillaries. Why are these differences significant in the overall function of the circulatory system? Please be specific.