The superior vena cava and the inferior vena cava are directly connected to the right atrium.
There is no vein that connects directly to the right ventricle. The inferior and superior vena cava enter the right atria and the pulmonary artery leaves the right ventricle. See link below:
The right pulmonary veins carry oxygenated blood from the right lung to the left atrium of the heart. This blood then enters the left ventricle before being pumped to the rest of the body to deliver oxygen and nutrients.
The systemic circuit ends at the vena cava, the largest vein in the body, which carries deoxygenated blood from the body back to the right atrium of the heart.
Coronary veins carry deoxygenated blood with carbon dioxide away from the heart muscle and back to the right atrium of the heart.
In many Western cultures, the ring finger on the left hand is traditionally associated with marriage. This finger is believed to have a vein connected directly to the heart, symbolizing love and commitment.
pulmonary vein
pulmonary vein
pulmonary trunk
Depends on which atria you are asking about. Blood enters the right atrium from the vena cava and the left atrium from the pulmonary vein.
The vein that transports oxygenated blood to the right atrium of the heart is the pulmonary vein. It carries freshly oxygenated blood from the lungs back to the heart for circulation to the rest of the body.
pulmonary vein
The major vein that leads into the right atrium is the vena cava. The superior vena cava carries deoxygenated blood from the upper part of the body into the right atrium. The inferior vena cava carries deoxygenated blood from the lower part of the body into the right atrium.
right atrium -> right ventricle -> pulmonary artery -> pulmonary vein -> left atrium -> left ventricle -> aorta
for blood to reach the right atrium from the small intestines it follows this path: Small veins - portal vein- liver- inferior caval vein - right atrium The blood flows mostly northwards
The pulmonary vein transports oxygenated blood back to the right atrium from the lungs.
vena cava
The vena cava.