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The ureters are tubes composed of smooth muscle that transport urine from the kidneys to the urinary bladder. In an adult human, the ureters typically measure 20 to ...
The human urinary system, also known as the urinary tract or renal system, consists of the kidneys, ureters, bladder, and the urethra.The purpose of the urinary system is to eliminate waste from the body, regulate blood volume and blood pressure, control levels of electrolytes and metabolites, and regulate blood pH.
Thereafter, terms "ureter" and "urethra" were variably used to refer to each other thereafter for more than a millennia. [31] It was only in the 1550s that anatomists such as Bartolomeo Eustacchio and Jacques Dubois began to use the terms to specifically and consistently refer to what is in modern English called the ureter and the urethra. [31]
Ureter cancer rarely causes problems in the early stages, but as the cancer progresses, there are often side effects. [5] Symptoms of ureteral cancer may include "blood in the urine (); diminished urine stream and straining to void (caused by urethral stricture); frequent urination and increased nighttime urination (); hardening of tissue in the perineum, labia, or penis; itching; incontinence ...
Ectopic ureter (or ureteral ectopia) is a medical condition where the ureter, rather than terminating at the urinary bladder, terminates at a different site. [ 1 ] [ 2 ] In males this site is usually the urethra , in females this is usually the urethra or vagina . [ 3 ]
Duplicated ureter or duplex collecting system is a congenital condition in which the ureteric bud, the embryological origin of the ureter, splits (or arises twice), resulting in two ureters draining a single kidney. It is the most common renal abnormality, occurring in approximately 1% of the population.
The metanephros is the definite, permanent, but yet immature kidney. It arises from two directions. On one hand, the precursor of the ureter buds from the Wolffian duct, while on the other hand, the precursor of the renal tubules develop from the metanephrogenic blastema.
At this time the ureters move from the mesonephric ducts to the trigone. [7] In males, the base of the bladder lies between the rectum and the pubic symphysis. It is superior to the prostate, and separated from the rectum by the recto-vesical pouch. In females, the bladder sits inferior to the uterus and anterior to the vagina; thus its maximum ...