After leaving the systemic veins, blood enters the heart to be pumped to the lungs. There is gives up its carbon dioxide, takes in oxygen, enters the heart again, and is pumped to the body through the arteries.
Blood returning from systemic circulation enters the heart at the right atrium. Blood from the pulmonary circulation enters the left atrium.
Blood passes through the bicuspid valve and enters the left ventricle.
The pure blood after circulation leaves the heart and enters into the aorta or the aortic arch. Then from here it circulates in the whole body for the exchange of materials. The impure blood, coming from the superior and inferior vena cava, circulates in the heart and enters into the lungs through the pulmonary artery for its purification.
Blood first leaves the heart of a fish and enters the gills for oxygenation. From the gills, oxygenated blood is transported to the rest of the fish's body through arteries.
Both! Blood enters the atria (upper chambers) on both sides of the heart at the same time. Blood from the body, carrying carbon dioxide, enters the right atrium. Blood from the lungs, carrying oxygen, enters the left atrium. The two atria contract together, pumping the blood into the two ventricles (lower chambers). The ventricles then contract, pumping blood out of the heart. Blood from the right ventricle goes to the lungs, where it loses its carbon dioxide and picks up oxygen. It then goes to the left atrium. Blood from the left ventricle goes to the body, where it delivers oxygen and picks up carbon dioxide. See: http://www.bbc.co.uk/science/humanbody/body/factfiles/heart/heart.shtml
the blood goes for purification to the lungs.Then it enters the heart from the pulmonery valve and comes in the 3 column of our heart then goes to the 4 column of our heart from the mitral valve.Then it goes in the aorta and then aorta spreads all the blood to our body
Highly oxygenated blood enters the heart via the pulmonary veins into the left atrium of the heart. Veins return to the heart and normally have relatively deoxygenated blood (pulmonary veins are an exception to this rule and have freshly-oxygenated blood) while arteries go away from the heart and have highly oxygenated blood (the pulmonary artery bringing blood from the right ventricle toward the lungs is an exception and has poorly oxygenated blood).
In the mammalian (and avian) heart, blood passes directly from the atria into the corresponding ventricles. So blood from the right atrium next enters the right ventricle.
Arteries carry blood away from the heart, veins carry blood to the heart
Remember veins back to the heart. This goes into the heart to deliver oxygen.
First the deoxygenated blood enters the heart through the superior vena cava, then it goes through the tricuspid valve into the right ventricle. From there it goes through the pulmonary valve and the pulmonary artery into the lungs to get oxygenated. Once it's oxygenated, it comes back from the lungs and goes through the left atrium and enters the left ventricle though mirtal valve. From there it leaves the heart through the aorta and is transported through the rest of the body.
It circulates throughout the body.