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 would have the cleanest blood because the kidney would have filtered out the poisons so the blood is clean.Arterial blood has foreign substances in it. The renal artery takes blood to the kidney. The renal vein takes blood away from the kidney. In the kidney, the waste product urea is filtered out of the blood.   So â¦ the main difference is in the amount of urea in the blood: high in the renal artery and low in the renal vein. 13 people found this useful.