Azygos Venous System 3D

  • Azygous Vein                                                                      
    • * Originates at the junction of the right ascending lumbar and subcostal veins, entering the chest through the aortic hiatus.
    • * Ascends along the anterolateral surface of the thoracic vertebrae and arches ventrally to the right main bronchus at T5–T6, draining into the SVC.
    • * Receives the right intercostal veins, the right superior intercostal vein, and the hemiazygos and accessory hemiazygos veins.

 

  • Hemiazygos Vein
    • * Is formed by the union of the left subcostal and ascending lumbar veins. Its lower end is connected to the left renal vein.
    • * Ascends on the left side of the vertebral bodies behind the thoracic aorta, receiving the 9th, 10th, and 11th posterior intercostal veins.
    • * Drains into azygos vein.

 

  • Accessory Hemiazygos Vein
    • * Is formed by the confluence of the middle left posterior intercostal veins.
    • * Descends to the left of midline, adjacent to the thoracic vertebrae and crosses posteriorly to the aorta at the level of T7-8 to drain into the azygos vein.

                                                                                                           

  • Superior Intercostal Vein
    • * Is formed by a union of the second, third, and fourth posterior intercostal veins.
    • * Drains into the azygos vein on the right and the brachiocephalic vein on the left.

                                                               

  • Posterior Intercostal Vein
    • * These veins drain the intercostal spaces posteriorly. They run with their corresponding posterior intercostal artery on the underside of the rib, the vein superior to the artery.
    • * The first intercostal vein on each side drains into the corresponding brachiocephalic vein.
    • * The second, third, and the fourth intercostal veins join to form the superior intercostal vein.
    • * The rest of the veins drain into the azygos vein on the right and into the hemiazygos or accessory hemiazygos veins on the left.

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  • Azygous Vein                                                                      
    • * Originates at the junction of the right ascending lumbar and subcostal veins, entering the chest through the aortic hiatus.
    • * Ascends along the anterolateral surface of the thoracic vertebrae and arches ventrally to the right main bronchus at T5–T6, draining into the SVC.
    • * Receives the right intercostal veins, the right superior intercostal vein, and the hemiazygos and accessory hemiazygos veins.

 

  • Hemiazygos Vein
    • * Is formed by the union of the left subcostal and ascending lumbar veins. Its lower end is connected to the left renal vein.
    • * Ascends on the left side of the vertebral bodies behind the thoracic aorta, receiving the 9th, 10th, and 11th posterior intercostal veins.
    • * Drains into azygos vein.

 

  • Accessory Hemiazygos Vein
    • * Is formed by the confluence of the middle left posterior intercostal veins.
    • * Descends to the left of midline, adjacent to the thoracic vertebrae and crosses posteriorly to the aorta at the level of T7-8 to drain into the azygos vein.

                                                                                                           

  • Superior Intercostal Vein
    • * Is formed by a union of the second, third, and fourth posterior intercostal veins.
    • * Drains into the azygos vein on the right and the brachiocephalic vein on the left.

                                                               

  • Posterior Intercostal Vein
    • * These veins drain the intercostal spaces posteriorly. They run with their corresponding posterior intercostal artery on the underside of the rib, the vein superior to the artery.
    • * The first intercostal vein on each side drains into the corresponding brachiocephalic vein.
    • * The second, third, and the fourth intercostal veins join to form the superior intercostal vein.
    • * The rest of the veins drain into the azygos vein on the right and into the hemiazygos or accessory hemiazygos veins on the left.

Following answers are created by ChatGPT. Occasionally the answer may be harmful, incorrect, false, misleading, incomplete, or limited in knowledge of world. Please contact your doctor for all healthcare decisions. Also, double check the answer provided by the AI below.

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