Science Projects

T he blood coming back from the lungs  is going to come back in the pulmonary  veins and this blood is oxygenated and  if you do an oxygen saturation test on  yourself you'll probably find your  oxygen saturations are about 98 or 99  percent anywhere between 96 and 100% and  if you're young and fit you put an  oxygen saturation probe on your finger  you find it's 98% take a few deep  breaths and it will go up to 100%  meaning your lungs are completely  saturating the blood passing through  them with oxygen and this highly  oxygenated blood containing the  oxyhemoglobin is going to return from  the lungs in the four pulmonary veins  into the left atrium from here the blood  will go through the mitral valve into  the left ventricle when the left  ventricle contracts that blood will be  ejected through the aortic semilunar  valve into the aorta from there into  smaller arterie...

   The heart is a hollow muscular organ  located in the thoracic cavity and in this article you will  learn the basic anatomical  terminology and the basic anatomical  structures in the heart. So here you can see the picture of heart. main bottom chambers in the heart and  these bottom chambers are called the  ventricles so a left ventricle  on one side and the right ventricle on  the other side and the left ventricle  particularly has a thick muscular wall  of the left ventricle and of course the  right ventricle also has a muscular wall  but it's much thinner now why is it that  the left ventricle has a thick muscular  wall and the right ventricle has a thin  muscular wall  as  left ventricle that's pumping blood all  around the body into the systemic  circulation so the blood that's pumped  from the left ventricle goes to your  ears down to your toes up to your brain...