Explain Loop of Henle - Structures of a Nephron

Loop of Henle: The Loop of Henle is a long U-shaped part of the renal tubule, extending through the medulla from the end of the PCT to the beginning of the DCT. It begins with a descending limb having a thick-walled segment called the proximal straight tubule that is followed by a thin-walled segment called the thin or attenuated tubule; this is followed by the ascending limb that occasionally includes the distal end of the attenuated tubule and always ends with a long thick-walled segment called the distal straight tubule. The loops differ in the lengths of their segments according to their locations in the kidney. It is also called as ansa nephroni and is responsible for carrying urine out of the nephron.