oxygenated blood never goes to the heart in?
Smriti99:
anterior vena cava also known as superior vena cava or precaval never carries blood to the heart. only the posterior vena cava also known as inferior vena cava does.
heart is also an organ,so it also requires some oxygen for respiration,hence oxygenated blood is transported through separate branch known as coronary artery which nourish the muscles of heart.
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Heart is a four chambered organ. Two auricles (left and right) and two ventricles (left and right). Superior venecavae drains deoxygenated blood from above the level of heart into right auricle and inferior venecavae supplies deoxygenated blood from rest of the body below the position of heart into the right auricle as well. Left auricle gets oxygeneted blood from lungs through pulmonary veins. The auricles pushes their respective blood into right and left ventricles respectively. Left auricles pushes the blood through bicuspid valve and right auricles pushes blood through tricuspid valve. Then left ventricles push the oxygeneted blood through semilar valves into the aorta from pure blood is carried to rest of the body through various arteries. Simultaneously , at the same time, right ventricle pushes the deoxygenated blood through semilaunar valve into pulmonary artery which drains the impure blood to lungs for purification.
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