What is the route blood takes from the first time it enters the heart to its dep!
Question: I'll assume you mean from when it enters from the systemic circulation to when it leaves to the systemic circulation.
Blood enters the heart via either the inferior or superior vena cava. From there, it enters the right atrium and passes downward to the right ventricle through the tricuspid valve. From there, the blood passes through the pulmonary semilunar valve into the pulmonary artery. After this, the blood passes through the pulmonary trunk into the pulmonary artery, is reoxygenated in the lungs, and returns to the heart via the pulmonary vein. It reenters the heart in the left atrium, passes downward through the bicuspid (mitral) valve into the left ventricle, and is pushed up through the aortic semilunar valve, back into the systemic circulation, where it splits and is distributed to your various body parts.
Answers: I'll assume you mean from when it enters from the systemic circulation to when it leaves to the systemic circulation.
Blood enters the heart via either the inferior or superior vena cava. From there, it enters the right atrium and passes downward to the right ventricle through the tricuspid valve. From there, the blood passes through the pulmonary semilunar valve into the pulmonary artery. After this, the blood passes through the pulmonary trunk into the pulmonary artery, is reoxygenated in the lungs, and returns to the heart via the pulmonary vein. It reenters the heart in the left atrium, passes downward through the bicuspid (mitral) valve into the left ventricle, and is pushed up through the aortic semilunar valve, back into the systemic circulation, where it splits and is distributed to your various body parts.