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
Bladder fiddle Bladder fiddle The bladder fiddle (also known as bumbass or poispil) is a folk instrument used throughout Europe. The instrument was a simple large monochord made with a long stick, a thick gut string, and a pig's bladder. It is bowed with either a notched stick or a horsehair bow. It is known under different names; in Germany it was called the bumbass, in France the "basse de Flandre", and in England a drone, "drone and string" or bladder fiddle. In Germany sometimes a bell or cymbal was added to the top for decoration or additional sound. In England it