Welcome to Biological Science Advanced Studies. This site is designed for biology students of A-level, AS and A2, covering the related topics in Biology and Human Biology.
Deoxygenated blood enters through the inferior vena cava. This blood then gets to the atrium, after a contraction the blood is forced to enter the right ventricle. The right ventricle contracts allowing the blood to be pumped into the pulmonary artery sending the deoxygenated blood through the blood vessels into the lungs. Once the right ventricles contract the pressure rises and the tricuspid valves shut preventing back flow. The pressure opens the pulmonary valve allowing the blood to enter the circulation of the lungs.
Oxygenated blood enters the heart through to the pulmonary veins> the left atrium contracts allowing the blood to flow into the left ventricle. The left ventricle then contracts (left atrioventricular valves close to prevent back flow). The aorte valves open and oxygenated blood is forced through the aorte (the valve shuts to prevent back flow).
Question: What is the purpose of the superior vena cava if this video suggests blood flows through the inferior vena cava?
The atrium causing it to contract and pump blood into the ventricle. The electrical impulse is then conducted to the ventricles through a form of ‘junction box’ called the AV node. The impulse spreads into the ventricles, causing the muscle to contract and to pump out the blood. The blood from the right ventricle goes to the lungs, and the blood from the left ventricle goes to the body.
Deoxygenated blood enters through the inferior vena cava. This blood then gets to the atrium, after a contraction the blood is forced to enter the right ventricle. The right ventricle contracts allowing the blood to be pumped into the pulmonary artery sending the deoxygenated blood through the blood vessels into the lungs. Once the right ventricles contract the pressure rises and the tricuspid valves shut preventing back flow. The pressure opens the pulmonary valve allowing the blood to enter the circulation of the lungs.
Oxygenated blood enters the heart through to the pulmonary veins> the left atrium contracts allowing the blood to flow into the left ventricle. The left ventricle then contracts (left atrioventricular valves close to prevent back flow). The aorte valves open and oxygenated blood is forced through the aorte (the valve shuts to prevent back flow).
Question: What is the purpose of the superior vena cava if this video suggests blood flows through the inferior vena cava?
The atrium causing it to contract and pump blood into the ventricle. The electrical impulse is then conducted to the ventricles through a form of ‘junction box’ called the AV node. The impulse spreads into the ventricles, causing the muscle to contract and to pump out the blood. The blood from the right ventricle goes to the lungs, and the blood from the left ventricle goes to the body.