Artery of Adamkiewicz
In human anatomy, the artery of Adamkiewicz (also arteria radicularis magna) is the largest anterior segmental medullary artery. It typically arises from a left posterior intercostal artery at the level of the 9th to 12th intercostal artery, which branches from the aorta, and supplies the lower two thirds of the spinal cord via the anterior spinal artery.
Parathyroid artery
The parathyroid artery is the blood vessel that carries blood to each of the parathyroid glands. The parathyroid artery is the single individual artery that provides oxygenated blood supply to the parathyroid glands. While studies have concluded that most subjects' parathyoid glands are supplied by the thyroid arteries, up to 45% have been determined to have a "distinct anastomosing branch between the inferior and the superior thyroid arteries." Some have been shown to contain two are more parathroid arteries.