PATHOLOGY

Detailed explanation-1: -Although the ureteric bud is an outgrowth from the mesonephric duct, it has a separate opening into the urinary bladder. As the kidneys ascend, the ureters elongate and open into the bladder superiorly, while the roots of the mesonephric ducts are carried inferiorly, before fusing to form the trigone region.

Detailed explanation-2: -Derivatives of the ureteric bud: Collecting tubules and ducts. Minor and major calyces. Ureters.

Detailed explanation-3: -The metanephros develops from the ureteric bud and the metanephrogenic blastema. The ureteric bud forms the primitive ureter of the metanephric kidney and dilates at its upper end to become the renal pelvis, enveloped by the metanephrogenic cap.