Explanation:
Nephrons are connected with the Excretory system. A nephron is the basic unit of structure in the kidney. The nephron functions through ultrafiltration.A nephron is a long tubule differentiated into four regions having different anatomical features and physiological role : Bowman’s capsule, proximal convoluted tubule (PCT), loop of Henle, and distal convoluted tubule (DCT).Hence, the correct option is (D).