Minor calyx
Encyclopedia
The minor calyx, in the kidney, surrounds the apex of the renal pyramids. Urine
formed in the kidney
passes through a papilla at the apex into the minor calyx then into the major calyx
.
Peristalsis
of the smooth muscle originating in pace-maker cells originating in the walls of the calyces propels urine through the renal pelvis
and ureter
s to the bladder
.
Urine
Urine is a typically sterile liquid by-product of the body that is secreted by the kidneys through a process called urination and excreted through the urethra. Cellular metabolism generates numerous by-products, many rich in nitrogen, that require elimination from the bloodstream...
formed in the kidney
Kidney
The kidneys, organs with several functions, serve essential regulatory roles in most animals, including vertebrates and some invertebrates. They are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid–base balance, and...
passes through a papilla at the apex into the minor calyx then into the major calyx
Major calyx
Two or three minor calyces converge to form a major calyx. The major calyx, in the kidney, surrounds the apex of the renal pyramids. Urine formed in the kidney passes through a renal papilla at the apex into a minor calyx then into major calyx before passing through the renal pelvis into the...
.
Peristalsis
Peristalsis
Peristalsis is a radially symmetrical contraction and relaxation of muscles which propagates in a wave down the muscular tube, in an anterograde fashion. In humans, peristalsis is found in the contraction of smooth muscles to propel contents through the digestive tract. Earthworms use a similar...
of the smooth muscle originating in pace-maker cells originating in the walls of the calyces propels urine through the renal pelvis
Renal pelvis
The renal pelvis or pyelum is the funnel-like dilated proximal part of the ureter in the kidney.In humans, the renal pelvis is the point of convergence of two or three major calyces...
and ureter
Ureter
In human anatomy, the ureters are muscular tubes that propel urine from the kidneys to the urinary bladder. In the adult, the ureters are usually long and ~3-4 mm in diameter....
s to the bladder
Urinary bladder
The urinary bladder is the organ that collects urine excreted by the kidneys before disposal by urination. A hollow muscular, and distensible organ, the bladder sits on the pelvic floor...
.
