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Brachiocephalic veins and the vena azygos
The azygos vein and the hemiazygos vein drain into the superior vena cava. The blood will then travel from along the superior vena cava to enter the right atrium.
azygos v.
azygos vein
The azygos vein forms near the diaphragm; runs anterior and to the right of the vertebral column and ends in the superior vena cava. These veins drain most thoracic structures and the abdominal wall.
Blood goes from the vena cava into the right atrium of the heart
It is the azygos vein that is located on right side of abdominal and thoracic aorta and in front of right vegus nerve that drains into superior vena cava on its posterior aspect just before vena cava drains into right atrium.azygos vein
The azygos venous system returns blood from the posterior walls of the thorax and the abdomen and dumps directly into the superior vena cava. The origin of this system begins at the various capillaries, it is a large and very variable network of veins. the azygos vein is situated on the rightside. embryologically the azygos vein must commences from the postrior surface of the inferior venacava at the level of renal veins. this azygos vein is called lumbar azygos vein. azygos vein may also commences by the fusion of the right subcostal vein and right ascending lumbar vein. development from the azygos line of veins of the right side and right posterior cardinal vein. this forms the azygos system of veins including others like, hemiazygos vein, accessory hemiazygos vein.
superior vena cava
SVCS is also called superior mediastinal syndrome and/or superior vena cava obstruction.
The superior vena cava is responsible for delivering deoxygenated blood from the upper portion of your body to the heart.
The superior vena cava brings deoxygenated blood into the heart, into the right atrium. The superior vena cava is formed by union of the right and left brachiocephalic (innominate) veins.