Heart has to work harder to force blood through narrowed vessels blood pressure increases. The risk is even greater for women who smoke and also take birth control pills. Heart disease and heart attacks video khan academy. Ian, humans will always have some plaque in the coronary artery. Coronary arteries form the network of blood vessels on the surface of the heart that. A clot can sometimes obstruct the blood flow, causing serious health problems. High blood pressureprolonged stress, certain diets, lack of excersize and obesity can increase your blood pressure.
Aqa a level biology heart disease flashcards quizlet. People who smoke are two to four times more likely to get heart disease. This damage increases your risk of atherosclerosis. Smoking increases the concentration of blood cholesterol, which is a risk factor, so smokers increase the risk of having heart disease or a stroke. It is often the underlying cause that leads to heart disease.
Cardiovascular disease and blood clotting in a snap. If a clot forms in the coronary arteries it is called coronary thrombosis. Th e fatty material, known as atheroma, forms plaques within the artery walls. Scool revision summary scool, the revision website. Systems biology research into cardiovascular disease. The clot blocking the coronary artery may not have formed actually within the heart itself. The risks of developing the disease increases with age and men are more at risk than women. Age blood vessels become less flexible with advancing age. Atherosclerosis is a progressive inflammatory thickening of the arterial wall resulting from increased cellularity and the accumulation of lipids, cellular. Its usually caused by a buildup of fatty deposits on the walls of the arteries around the heart coronary. Smoking can also make your bones more brittle and so more likely to break. Being overweight increases the risk as does eating a diet high in saturated fat and salt. Dangers of smoking health biology fuseschool youtube.
Cardiovascular disease and blood clotting alevel biology ocr. So weve seen that smoking increases your risk of heart, lung, kidney disease, strokes and cancers. They also can damage the function of your heart and the structure and function of your blood vessels. Every cigarette you smoke makes you more likely to get heart disease. There are several risk factors for coronary heart disease chd, including.
Roughly 1 out of 5 deaths from heart disease is directly related to smoking. This is the build up of fatty material in the walls of arteries. Atherosclerosis is a disease in which a waxy substance called plaque builds up in the arteries. Cardiovascular disease cvd is a general term for conditions affecting the heart or blood vessels. Coronary heart disease is a major cause of death in the uk and much of the rest of the world.