The name for this vein is derived from that of the azygos vein.

This vein mirrors the bottom half the azygos vein.

It flows into the azygos vein.

The azygos vein is a vein running up the right side of the thoracic vertebral column.

The azygos vein is unpaired in that there is only one in the body, mostly on the right side.

Specifically, the hemiazygos vein mirrors the bottom part of the azygos vein.

The azygos vein joins it just before it enters the right atrium, at the upper right front portion of the heart.

The azygos vein arches over it from behind; and the right pulmonary artery lies at first below and then in front of it.

It either crosses the body of the eighth thoracic vertebra to join the azygos vein or ends in the hemiazygos.

This fibrous arch forms the anterior aspect of the aortic hiatus, through which the aorta, thoracic duct, and azygos vein pass.

It also anastomoses with the azygos vein system (which runs on the right side of the vertebral column) and venous plexuses next to the spinal cord.

The remaining posterior intercostal veins drain into the azygos vein on the right, or the hemiazygos vein on the left.

The esophageal veins drain blood from the esophagus to the azygos vein, in the thorax, and to the inferior thyroid vein in the neck.

This "arch of the azygos vein" (arcus venae azygos) is an important anatomic landmark.

The crura connect to form an arch, behind which is the aortic hiatus, through which pass the aorta, the azygos vein, and the thoracic duct.

The root of the right lung lies behind the superior vena cava and part of the right atrium, and below the azygos vein.

The hemiazygos vein and the accessory hemiazygos vein, when taken together, essentially serve as the left-sided equivalent of the azygos vein.

The azygos vein transports deoxygenated blood from the posterior walls of the thorax and abdomen into the superior vena cava vein.

He discovered the circulation of the blood, and through dissections of the Azygos vein, he was the first to observe and speculate about the venous valves found there.

Well-known structures incorporating this nomenclature include the azygos vein, ganglion impar, and the anatomical variant known as the azygos lobe of the lung.

The supracardinal veins form part of the inferior vena cava, the intercostal veins, hemiazygos vein and azygos vein.

While there is the hemiazygos vein and its accessory on the left side of the body, they are considered tributaries of the azygos vein rather than its left-side equivalent.

The azygos system of veins is considered to be the azygos vein, along with its left-sided counterparts, the hemiazygos vein and the accessory hemiazygos vein.

The SVC is joined posteriorly by the azygos vein as it loops over the right mainstem bronchus and lies posterior to and to the right of the ascending aorta.

It traverses the diaphragm at the aortic aperture and ascends the superior and posterior mediastinum between the descending thoracic aorta (to its left) and the azygos vein (to its right).