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Ureter, 5. Urinary bladder, 6. Urethra. ... which the low power of the original X-rays could not penetrate enough to produce clear images. [32] ...
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]
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 November 2024. This article is about the human urinary system. For urinary systems of other vertebrates, see Urinary systems of birds, urinary systems of reptiles, and urinary systems of amphibians. Anatomical system consisting of the kidneys, ureters, urinary bladder, and the urethra Urinary system 1 ...
In placental mammals, urine enters the bladder via the ureters and exits via the urethra during urination. [ 1 ] [ 2 ] In humans, the bladder is a distensible organ that sits on the pelvic floor . The typical adult human bladder will hold between 300 and 500 ml (10 and 17 fl oz ) before the urge to empty occurs, but can hold considerably more.
The urinary meatus [a] (/ m iː ˈ eɪ t ə s /, mee-AY-təs; pl.: meati or meatuses), also known as the external urethral orifice, is the opening of the penis or vulva where urine exits the urethra during urination.
The name reflects that each renal pelvis collects urine from the calyces and funnels it into the ureter like a wash basin collects water and funnels it into a drain pipe. The renal pelvis is occasionally called the pyelum (from Greek πύελος pýelos , "trough", ‘anything hollow’), and the combining form pyelo- denotes the renal pelvis ...
The ureters are muscular ducts that propel urine from the kidneys to the urinary bladder. In the human adult, the ureters are usually 25–30 cm (10–12 in) long. In humans, the ureters arise from the renal pelvis on the medial aspect of each kidney before descending towards the bladder on the front of the psoas major muscle. The ureters cross ...
In males and females, both internal and external urethral sphincters function to prevent the release of urine. The internal urethral sphincter controls involuntary urine flow from the bladder to the urethra, whereas the external urethral sphincter controls voluntary urine flow from the bladder to the urethra. [2]