Final answer:
Reabsorbed fluids and solutes in the PCT are picked up by the peritubular capillaries and the vasa recta, where active transport of sodium drives the passive reabsorption of water due to osmotic gradients.
Step-by-step explanation:
The fluid and solutes reabsorbed in the Proximal Convoluted Tubule (PCT) are picked up by the peritubular capillaries and vasa recta. As fluid is filtered through the glomerulus, it enters the PCT, where important substances such as glucose, amino acids, sodium (Na+), and water are reabsorbed. Sodium is actively transported out of the PCT, creating a concentration gradient that drives the passive reabsorption of water, due to their osmolarity and concentration gradients. This water follows sodium back into the circulation, primarily through the peritubular capillaries and vasa recta, aiding in the regulation of bodily fluids and maintaining homeostasis.