A calyx is a part in the kidney. Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...

Calyces surround the appex of the malpighian pyramids. Urine formed in the kidney passes through a papilla at the apex into a minor calyx then into major calyx before passing through the pelvis into the ureter. Peristalsis of the smooth muscle originating in pace-maker cells originating in the walls of the calyses propels urine through the pelvis and ureters to the bladder. Urine is liquid waste excreted by the kidneys and eventually expelled from the body in a process known as urination. ... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... Transverse section of ureter. ... Peristalsis is the process of involuntary wave-like successive muscular contractions by which food is moved through the digestive tract. ...