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The middle part of the ureter drains into the right paracaval and interaortocaval nodes on the right, and the left paraaortic nodes on the left. [1] In the lower ureter, lymph may drain into the common iliac lymph nodes, or lower down in the pelvis to the common, external, or internal iliac lymph nodes. [2]
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 study of the human body includes anatomy, physiology, histology and embryology. ... The urinary system consists of the two kidneys, two ureters, bladder, ...
Urine is excreted through the renal papillae into the calyces and then into the pelvis, ureter, and bladder. [62] [28] Then it is excreted outside through the urethra. [64] In monotremes, the ureters open into the urogenital sinus, which is connected to the urinary bladder and cloaca, [65] and urine is excreted into the cloaca instead of the ...
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]
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 ...
The detrusor muscle, also detrusor urinae muscle, muscularis propria of the urinary bladder and (less precise) muscularis propria, is smooth muscle found in the wall of the bladder.