Blood leaving the heart for the body passes through a large blood vessel called the
The right side of the heart receives deoxygenated blood (lacking oxygen) from the body. After passing through the right atrium and right ventricle this blood is pumped to the lungs. Here blood picks up oxygen and loses another gas called carbon dioxide. Once through the lungs, the blood flows back to the left atrium. 1 Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. 2  As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve. Right Side of the Heart. 1  Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. 2  As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve. These are the only veins in the body that carry fresh, oxygenated blood. Blood leaves the heart from the left ventricle through the artery called the aorta. The aorta has several branches into other arteries that are carrying blood away from the heart and to the body tissues. The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. 1  Arteries begin with the aorta, the large artery leaving the heart. 2  They carry oxygen-rich blood away from the heart to all of the body's tissues. Best Answer: Blood enters the heart through two large veins (the inferior and superior vena cava) and empties oxygen-poor blood from the body into the right atrium. Blood flows from the right atrium into the right ventricle through the open tricuspid valve. Left Side of the Heart. 1  The pulmonary vein empties oxygen-rich blood from the lungs into the left atrium of the heart. 2  As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve. 3  When the ventricle is full, the mitral valve shuts. From the right ventricle, blood is pumped through the pulmonary valve into the blood vessel that goes to the lungs. This blood then picks up oxygen (becomes oxygenated or oxygen-rich). Oxygen-rich blood flows from the lungs through blood vessels back to the heart's left atrium. Blood travels through the pulmonary arteries to your lungs to pick up oxygen. Left Side. The aortic valve closes quickly to prevent blood from flowing back into the left ventricle, which is already filling up with new blood. Blood leaves the heart through the aortic valve, into the aorta and to the body. 1 The ventricles contract and pump blood through one-way valves into large arteries. 2  The arteries going from the right ventricle take blood to the lungs. 3  The arteries going from the left ventricle take blood to the rest of the body. 4  The heart then rests for a short time (diastole).
Aorta 