The bladder and urethra develop from the endoderm, the innermost of the three primary germ layers in an early embryo.The bladder develops from the upper end of the urogenital sinus, which is lined with endoderm and continuous with the allantois.
AI-generated
The ureters are derived from intermediate mesoderm during embryology.The intermediate mesoderm divides into the nephrogenic ridge, which forms the ureters, and the gonadal ridge, which forms the gonads.The urogenital ridge, a region of intermediate mesoderm, is the source of the embryonic kidney and the gonad, which gives rise to the urinary system.
AI-generated
The renal pelvis is derived from the ureteric bud, which is an outgrowth of the mesonephric duct, which originates from intermediate mesoderm.