Question

pathway from large intestine to hepatic vein to the liver to IVC to the heart to the renal artery

Answer 1

- The pathway from large intestine to hepatic vein to the liver to IVC to the heart to the renal artery is as follows:-

Inferior mesenteric vein --> splenic vein --> hepatic portal vein --> liver --> hepatic veins --> inferior vena cava --> right atrium of the heart --> right ventricle --> pulmonary trunk --> lungs --> pulmonary veins --> left atrium --> left ventricle --> ascending aorta --> arch of aorta --> descending thoracic aorta --> abdominal aorta --> renal artery.

- Inferior mesenteric vein drains the blood from large intestine and empties into the splenic vein. Splenic vein unites with superior mesenteric vein to form hepatic portal vein which brings blood to the liver.

- From the liver, blood is transported to the heart through hepatic veins that drain into the inferior vena cava which ultimately drains into the right atrium of the heart.

- From the right atrium of the heart, blood flows into the right ventricle which pumps the blood into the lungs through pulmonary trunk during ventricular systole. In the lungs, blood is oxygenated and transported to the left atrium of the heart through two pairs of pulmonary veins. From the left atrium blood flows into the left ventricle which pumps the oxygenated blood into the systemic circulation through aorta during ventricular systole.

- Ascending aorta which carries oxygenated blood from the left ventricle give rise to arch of aorta which continues downwards as descending thoracic aorta. Descending thoracic aorta continues as abdominal aorta and renal arteries that supply the kidneys are direct branches of abdominal aorta.