How does venous blood driven back to the heart?

Answer 1

The heart has four chambers to it, the top two which are pumping oxygenated blood out to the rest of the body, while the bottom two are "sucking" (if you will) the blood back into the heart so it can be re oxygenated.

Answer 2

When the heart pumps it pushes blood through the body. The veins contain tiny little valves. When blood pushes through a valve during a heart beat, the valve closes behind it, like a one way door. Eventually the blood will have travelled through-out the body and then back to the heart.

Answer 3

The heart is the strongest muscle in the body. It all starts in the right atrium of the heart, which ironically is on the left side of the heart if your are looking at it from straight on, but if you are the person who's heart it is then it is on your right and the left atrium is on your left. It is not as confusing as it seems. The right atrium is on the left and the left atrium is on the right. During the Pulmonary Circuit, deoxygenated blood comes from the veins connected to the upper and lower body cells, also known as capillaries, into the superior vena cava. Then the blood enters in the right atrium of the heart from upper body and also enters into the inferior vena cava, which is connected to the lower body. Blood vessels carry blood in two different directions-away from and back to the heart and lungs. Then the tricuspid valve opens and closes to pump the blood into the right ventricle, which is south of the right atrium. Then this deoxygenated blood goes through the pulmonary valve to the pulmonary artery and out to the lungs where it is loaded with oxygen. Arteries are shown by red on maps and they carry oxygen-rich or oxygenated blood away from the heart. They are strong, thick-walled, elastic and capable of withstanding high pressures exerted by blood as it is pumped by the heart. There are three layers in arteries: an outer layer of connective tissue, a middle layer of smooth muscle and an inner layer of endothelial tissue. Next is the Systemic Circuit. The oxygenated blood then comes from the lungs through pulmonary veins into the left atrium. Veins are shown by blue on maps and they carry oxygen- poor or deoxygenated blood to the heart. They are the largest blood vessels. Smooth muscle in the walls of veins can expand or contract to adjust the flow volume returind to the heart and make more blood available when needed. The skeletal muscles during normal bod movements squeezes the veins and assists with moving blood back to the heart. Waste from blood is exhaled by the lungs. The bicuspid ("mitral valve") pumps this blood into the left ventricle, which is south of the left atrium. The left ventricle, which by the way is the strongest chamber in my system, pumps the oxygenated through the aortic valve to the aorta (the biggest artery in the body) and out to all around body, where it looses oxygen on the way making it deoxygenated blood and the cycle starts all over again when the blood finishes its cycle around the body and returns to the heart as deoxygenated blood. A fun fact is that the area between the left and right ventricles is known as the septum.

Answer 4

The veins have one-way valves so that compression of the veins through muscle activity propels the blood from the peripheral regions like the legs and arms back towards the heart.

Answer 5

it goes to the heart by the pumping of it.