Sound #2: The Squeal of a Banshee, But Under the Hood. 1  What you hear: A loud squealing noise coming from under the hood. 2  Whatâs happening: This is a classic sign of a loose or worn serpentine belt. 3  Cause for concern? Yes, because the serpentine belt powers all of your carâs major systems.
In Depth: Vessels. The kidneys are important to the bodyâs production of urine, but they also play a role in regulating important components of the blood. Blood comes to the kidneys from the abdominal aorta and inferior vena cava, the large arteries and veins that are part of the ascending aorta. Oxygenated blood is brought to the kidneys from a small branch called the renal artery.
The renal vein consists of deoxygenated blood that has been filtered from the kidney to the venacava. The renal artery carries oxygenated blood that consists of waste products. The blood in the Renal Vein:   * Is low in oxygen.  * Returns to the heart.   The blood in the Renal Artery:   * Has high amounts of oxygen.