Blood circulation involves four heart chambers:
It starts at the right atrium and then travels to the right ventricle. After the right ventricle blood travels towards the lungs to become oxygen rich and release Carbon-dioxide. After becoming rich with oxygen, the blood travels back to the heart and enters through the left atrium. It travels next through the right ventricle and then exits the heart through the aorta. This is where it goes it's separate directions to bring oxygenated blood to all of your bodily components.
Heart (Left Ventricle) -> Arteries -> Arterioles -> Capillaries -> Venules -> Veins -> Heart (Right Atrium)
The right side of your heart pumps blood through your lungs.
Oxygen rich blood from the lungs enters the heart through the left atrium in order for your heart to pump the blood to other areas of the body. The aorta pumps the oxygenated blood to the rest of the body.
The blood re-enters the heart through the superior vena cava and into the right atrium.
Oxygen-poor blood enters the heart through the right atrium
The right side of your heart pumps blood through your lungs.
As blood leaves the heart it travels through the arteries. The first one will be either the pulmonary artery (for blood leaving the right side of the heart) or the aorta (for blood leaving the left side of the heart).
In the right side of your heart, de-oxygenated blood from your body is coming to heart through Vena Cava (a vein) and enters right atrium. Then it's pumped to the right ventricle where it leaves through pulmonary artery (which leads to the lungs, where blood is getting oxygenated).
from systemic system (deoxygenated)through venae caveainto right atriumthrough tricuspid valveinto right ventricleout through pulmonary arteryto pulmonary system (oxygenated)back to heart through pulmonary veininto left atriumthrough bicuspid valveinto left ventriclethrough aorta and back to systemic system
Blood first enters the heart from the vena cavea into the right atrium. The pumping action of the heart then moves the blood into the right ventricle. From the right ventricle the blood is pumped into the pulmonary arteries which lead to the lungs. The blood is oxygenated and returned to the heart from the pulmonary veins to the left atrium. The pumping of the heart then moves the blood into the left ventricle and with a very strong contraction sends the blood throughout the rest of the body through the aorta.
Deoxygenated blood first enters the heart through the right atrium.
I will start from the right atrium and back. Blood is pumped into the right atrium from the superior and inferior vena cavas. From there the blood is pumped to the right ventricle, then sent through the pulmonary arteries to become oxygenated by the lungs. The oxygenated blood is then sent into the left atrium by the pulmonary viens, then pumped into the left ventricle. The blood is then pumped out through the aorta to the rest of the body. Blood travels further through the aorta (abdominal) until it reaches the renal artery. The blood exits through the renal vein and then back to the right atrium through the inferior vean cava.