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Healthy Heart Research Paper

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The heart is a muscular organ the size of a clenched fist situated in the middle of the chest tilted slightly to the left. The heart receives its own oxygenated blood supplied by the coronary arteries and the coronary veins that take away the deoxygenated blood. The heart is made up of four chambers the left and right atrium and the left and right ventricle. The oxygenated blood travels from the lungs through the pulmonary veins, the pulmonary vein are the only veins in the body that carry oxygenated blood to the heart, the blood then enters the left atrium the blood is then pushed through the bicuspid valve, where the blood now enters the left ventricle where the blood is then pumped through the aortic valve into the aorta where the oxygenated …show more content…

(Steve Parker 2007) The hearts wall are made of a special muscle known as cardiac muscle this type of muscle is only found in the heart because of its uniqueness, the muscle needs the ability to constantly contract without becoming weak or tired and to maintain this the muscle needs a continuous supply of oxygenated blood from the coronary arteries. The left and right side of the heart is divided by the septum, the septum also does not allow oxygenated and deoxygenated blood to mix and also helps support the …show more content…

The smallest of all vessels are the capillaries which are one cell thick, the pressure is very low and gas exchange happens in the capillaries. A myocardial infarction (heart attack) happens when coronary arteries get blocked this effects the supply of blood and oxygen to this part of the heart which can cause the heart muscle to die off from lack of oxygen and nutrients, if the muscle has died it will be replaced with scar tissue. Atherosclerosis is where arteries become clogged with plaques or atheroma which are cholesterol and excess fatty substances, these cause the arteries to harden and do not let the proper blood supply flow which can stop organs functioning properly. These plaques can rupture which causes a blood clot, the blood clot then blocks the hearts blood supply causing the hearts muscle to be deprived of oxygen and may result in the muscle dying.After a heart attack the hearts function may not be the same some complications can be Arrhythmia (abnormal heart beats) such as Tachycardia (heart beating too fast) Bradycardia (too slow) or Atrial Fibrillation (irregular heart

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The heart is divided into two halves by the septum, and blood in the right and left sides does not mix. The upper chambers or atria receive blood from the veins. The one-way flow of blood through the heart is controlled by valves at two points. The atrioventricular valves (mitral and tricuspid values) are like flags anchored by fibrous cords between the atria and the ventricles. The semilunar valves (aortic and pulmonary valve) are cup shaped and are found at the opening of the arteries.

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Plaque consists of cholesterol, fatty substances, waste products, calcium, and the clot-making substance called fibrin. Over time, plaque deposits on your artery walls, causing them to become narrow and stiff. This plaque will limit or stop blood flow to your heart muscle. Consequently, if your heart does not get enough blood, it can't get the oxygen and nutrients it needs to work properly. Not getting enough blood supply to your heart muscle can lead to chest discomfort or pain, also known as angina.

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