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Azygos lobe in axial computertomography. Arrow on azygos vein. HRCT thorax, axial section delineates a well-defined, convex-shaped fold (Blue arrow), the azygos fissure. A tear-drop shaped density noted at the bottom of the fold (Green arrow) is the azygos vein.
An accessory fissure was also found in 14% and 22% of left and right lungs, respectively. [47] An oblique fissure was found to be incomplete in 21% to 47% of left lungs. [48] In some cases a fissure is absent, or extra, resulting in a right lung with only two lobes, or a left lung with three lobes. [46]
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. It also creates a cavo-caval anastomosis by offering an alternative, collateral blood flow from the lower half of the body to the superior vena cava, bypassing the inferior vena cava.
The hemiazygos vein and the accessory hemiazygos vein, when taken together, essentially serve as the left-sided equivalent of the azygos vein. [2] That is, the azygos vein serves to drain most of the posterior intercostal veins on the right side of the body, and the hemiazygos vein and the accessory hemiazygos vein drain most of the posterior intercostal veins on the left side of the body. [2]
The remaining posterior intercostal veins drain into the azygos vein on the right, or the hemiazygos and accessory hemiazygos vein on the left. References
The right side drains into the azygos vein, while the left side drains into the left superior intercostal vein or the accessory hemiazygos vein. Bronchial veins are thereby part of the bronchial circulation, carrying waste products away from the cells that constitute the lungs. The bronchial veins are counterparts to the bronchial arteries.
From its origin at the cisterna chyli, the thoracic duct ascends anterior to and to the right of the vertebral column, situated in between the aorta, and the azygos vein. [3] The thoracic duct traverses the diaphragm at the aortic hiatus [ 3 ] to enter the posterior mediastinum .
This is a list of human anatomy mnemonics, categorized and alphabetized.For mnemonics in other medical specialties, see this list of medical mnemonics.Mnemonics serve as a systematic method for remembrance of functionally or systemically related items within regions of larger fields of study, such as those found in the study of specific areas of human anatomy, such as the bones in the hand ...