The "sheath of Henle" is a segment of the nephron in the kidney that plays a crucial role in the reabsorption of water and electrolytes. It is also referred to as the "loop of Henle" or simply as the "Henle loop." The sheath of Henle is essential in the production of urine, and it is responsible for regulating the concentration of solutes and water in the body. Other synonyms for the sheath of Henle include the "nephron loop," "Henle's tubule," and the "ascending and descending limbs of the loop of Henle." Regardless of the synonym used, the sheath of Henle is a critical component of the kidney's function, and its proper functioning is necessary for maintaining a healthy body.