Superior Vena Cava and the Inferior Vena Cava
If you mean not specifically, they are the veins.
Right Atrium.
At the right atrium.
the deoxygenated blood from whole body enters in right atrium which is then pumped to right ventricle from which it goes to lungs for oxygenation through pulmonary artery
Veins carry blood towards the heart. The particular veins that carry deoxygenated blood from the body to the right atrium of the heart are the superior vena cava and inferior vena cava. The pulmonary veins carry oxygenated blood from the lungs into the left atrium.
The deoxygenated blood shall enterheart through a vien named vena cava.
SYSTEMIC CIRCULATION:the oxygenated blood from left ventricle goes to the all organs(EXCEPT LUNGS) through left systemic artery and deoxygenated blood collected from organs enter right atrium. PULMONARY CIRCULATION: Impure blood from right atrium flows into right ventricle and goes to the lungs through the pulmonary artery. from the lungs oxygenated blood is collected into the left atrium through pulmonary veins
Right atrium is where the blood enters through superior or inferior vena cava.
The heart is divided into four compartments. The two upper portions where blood enters the heart from the body and lungs are the atria. Deoxygenated blood enters the right atrium, and oxygenated blood from the lungs enter the left atrium.
Oxygenated blood flows from the lungs to the left atrium contractions (heart muscle) cause the blood to leave the atrium and enter the left ventricle. Further contraction causes the blood to leave the atrium and enter the aorta.
The venous or deoxygenated blood flows into the right atrium. Then is goes to the right ventricle. From there it is pumped out to the lungs to get oxygenated and back into the left atrium then to the left ventricle and from there to the rest of the body.
The Right Atrium receives deoxygenated blood from the superior and inferior vena cava and pumps it into the right ventricle through the tricuspid valve. It then pumps it into the lungs to be oxygenated.