Blood circulation

Many people learned about the Circulatory System in their elementary school years, so for many, it would be hard to imagine a time where Civilization were unaware of how blood works. It wasn’t until 1682 when a English physician named William Harvey discovered the Circulatory System, before than people didn’t know where it came from and were unaware of its importance, and since then medicine developed rapidly increasing people’s life span and becoming the foundation of medicine, and how much it has

Studies looking at coronary collateral circulation in humans are typically more controversial. Skeptics have stated that collateral development is probably due to the progression of coronary artery disease rather than an effect of exercise training. In addition, direct measurement of collateral growth, typically through coronary angiographic techniques, is difficult and may have severe limitations due to low levels of resolution of vessels (Heaps et al., 2011). Small vessels involved in the coronary

The Impact of Melting Ice Caps There is a large amount research demonstrating the impact of global warming on our planet. As the overall temperature of the Earth increases, ice and snow masses are melting. As more ice and snow is lost, the ocean’s sea levels are rising. Additionally with less ice and snow, less sun light is reflected into space and instead it is absorbed by the planet. The continual absorption of the heat in sunlight gradually warms the planet along with other factors. Therefore

The global climate system is complex and its response to future anthropogenic greenhouse gases and to climate change adaptation, is often poorly understood. Climate change is an area where modeling in the framework of complex adaptive systems can improve our knowledge both with respect to the internal structure and adaptive mechanisms of climate and our capacity for designing efficient climate adaptation policies. Modeling of these systems includes a dynamic system consisting of transition equations

can receive from a physician is, their heart is not functioning properly. A malfunctioning heart will eventually lead to death if correction of the issue is not attempted. The heart supplies the entire body with oxygenated blood but also needs its own supply of oxygen rich blood. This is why coronary arteries are vital to the hearts ability to pump. A final option to correcting malfunctioning coronary arteries is a surgical procedure, coronary artery bypass grafting (CABG). Every year approximately

Ideas to note: • Interdisciplinary lens: This issue deals with ecology, psychology, and sociology. • Underlying science: Our ecosystem and environmental systems are being disrupted. The human race may be reaching carrying capacity on Earth. o Ecological collapse: when an ecological system suffers drastic change reducing the carrying capacity for all organisms ("Ecological Collapse," 2014) o Climate Change: measurable persisting changes within a climate ("Climate Change Basics", 2014) o Peak Oil:

sufficient coronary artery blood flow is essential to supply oxygen for normal cardiac activities. Myocardial ischaemia develops when there is an insufficient supply of blood and oxygen to support the function of myocardial cells (Craft, 2014, pg. 599). A decrease in blood supply can led to the formation of atherosclerotic plaques by narrowing or occluding the arteries. Other conditions such as hypotension, coronary spasm, dysthymias, hypoxemia and anaemia can also decrease the blood and oxygen supply to

Across the world, there are many global health issues which are being played out in which society faces. Whether it be a developing issue or one that has been plaguing society for an amount of time, as the world becomes a more globalized entity, many are beginning to realize that while we may face challenges individual to more local levels, there are just as many challenges that we must take on together. Climate change, and its effect upon human health, is one of these uniting challenges. While climate

arteries are the most proximal compartment of the coronary arterial system. Their diameter is generally ranging from 500 μm up to 2-5 mm. These are large epicardial coronary arteries that work as a capacitance function for the blood flow. They have very low resistance to blood flow and therefore, the pressure drop along the length of conductive arteries is negligible. The conductive arteries have an inbuilt characteristic of maintaining the shear stress by changing epicardial dilatation. This characteristic

MTX110 An inconvenient truth An Inconvenient Truth 1. What evidence does Al Gore present in the film to support each explanation of global climate change? Evidence for warming of the climate system includes observed increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level. The most common measure of global warming is the trend in globally averaged temperature near the Earth's surface 2. What does Al Gore present