Understand the structure of the nephron, which is the functional unit of the kidney responsible for filtering blood and forming urine.
Identify the main parts of the renal tubule in the nephron: Proximal convoluted tubule, Loop of Henle, Distal convoluted tubule, and Collecting duct.
Recognize that the sequence of these parts follows the path of filtrate flow through the nephron.
Start with the Proximal convoluted tubule, which is the first segment after the glomerulus where reabsorption of water, ions, and nutrients occurs.
Follow the filtrate as it moves to the Loop of Henle, then to the Distal convoluted tubule, and finally to the Collecting duct, where further reabsorption and secretion occur before urine is excreted.