Kidney development caudally (downward) and connect with the bladder, thereby forming the ureters. The ureters will carry urine from the kidneys to the bladder for excretion from the fetus into the amniotic sac. As the fetus develops, the torso elongates and the kidneys rotate and migrate upwards within the abdomen which causes the length of the ureters to increase. Kidney development Kidney development, or nephrogenesis, describes the embryologic origins of the kidney, a major organ in the urinary system. This article covers a 3 part developmental process that is observed in most reptiles, birds and mammals, including humans. Nephrogenesis is often considered
Underactive bladder et al. (2014). "Pathophysiology and animal modeling of underactive bladder." Int Urol Nephrol 46 Suppl 1: 11-21. van Koeveringe, G. A., K. L. Rademakers, et al. (2014). "Detrusor underactivity: Pathophysiological considerations, models and proposals for future research. ICI-RS 2013." Neurourol Urodyn 33(5): 591-596. Underactive bladder Underactive bladder syndrome (UAB) describes symptoms of difficulty with bladder emptying, such as hesitancy to start the stream, a poor or intermittent stream, or sensations of incomplete bladder emptying. The physical finding of detrusor pressurization of insufficient strength or duration to ensure timely and efficient bladder emptying is properly termed "detrusor underactivity" (DU) (Abrams et