The correct option is D Renal tubule
As blood enters your kidneys, it is filtered by glomerulus. The ultrafiltrate produced by the glomerulus initially contains small molecules like water, glucose, amino acids, bicarbonate, urea, and creatinine as well as ions such as potassium, sodium, chloride, calcium, and phosphate. All of this filtrate is channeled from the Bowman's space inside of the Bowman's capsule into the long series of ducts in the nephron, which are collectively called the renal tubule. During this journey, many things will be added and subtracted to and from the ultrafiltrate by the cells lining these ducts in order to finally form the urine. After this the tubular fluid leaves the renal tubules and passes to the collecting duct system, which connects the nephron to the ureter. Urine then enters the urinary bladder ( which collects waste excreted by the kidneys prior to disposal by urination) via the ureters and exits via the urethra.