the heart

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  • Created by: caleb
  • Created on: 17-10-13 19:39

structures of the heart

left ventricle. 

this has a thicker wall of muscle  due to having to pump blood around the entire body from the heart. during ventricular systole it pushes blood through the open semi-lunar vavle of the aorta to pump blood around the entire body. 

right ventricle

this has a thinner wall due to only having to pump blood  a short distance to the lungs, the thinner wall enables it to pump blood at a thinner pressure and therefore prevent damage to the delicate capilaries and alveoli in the lungs.

left atrium 

 this recives blood from the inferior and superior vena cava which bring deoxygenated blood from the body. during atrial systole the blood is pushed through the atrioventicular valve (triscupid) annd  into the right ventricle. 

left atrium 

the left atrium revieves oxygenated blood  from the pulmonary vein from the lungs, this is the  only  time in the body where oxygenated blood travels in a vein. during atrial systole the blood is forced through the left atrioventricular valve (biscupid) into the left ventricle 

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cardiovascular disease. 

myocardial infarction 

occurs when part of one of the coronary arteries has either a thrombotic or embolotic blockage causing lack of blood and therefore oxygen to the myocardial cells. this then causes ireversable cell death, if cell  death is too extenisive over the myocardium then it will not beat and without immediate transplant the patient will die. 


otherwise know as CVA or cerebralvascular attacke this occurs when one of the arteries in the brain become blocked and cause a lack of blood and therefore oxygen to the cells in the brain which can cause permenant brain damage and paralysis to any  part of the body. treatment for this includes the use of anti coagulants such as heparin to remove the clot if it was diagnosed via MRI to be thrombotic. or removed via femoral catheterisation if embolotic or wont be removed quickly enough via anti-coagulants. 

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