What are the ureters and the urethra?
The ureter is a small tube, or duct, that connects the bladder and kidneys. Urine passes through the ureter from the kidneys to the bladder. The urethra is the tubular path that connects the bladder to the body’s exterior, allowing urine to exit the body.
What are the three layers of the bladder?
Layers of the bladder wall
- serosa – a thin membrane that covers the top part of the bladder.
- adventitia – loose connective tissue that covers areas of the bladder where there is no serosa.
- perivesical fat – a layer of fat surrounding the bladder.
What is the function of the urethra in the urinary system?
Urethra. The tube that allows urine to pass outside the body. The brain signals the bladder muscles to tighten, which squeezes urine out of the bladder. At the same time, the brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra.
Where is the ureter?
The ureters begin at the ureteropelvic junction (UPJ) of the kidneys, which lie posteriorly to the renal vein and artery in the hilum. The ureters then travel inferiorly inside the abdominal cavity. They pass over (anterior to) the psoas muscle and enter the bladder on the posterior bladder aspect in the trigone.
What are the 4 main parts of the urinary system?
The kidneys, ureters, bladder and urethra make up the urinary system. They all work together to filter, store and remove liquid waste from your body.
Where is the urethra?
The urethra is a tube that connects the neck of your bladder to the urethral opening on your external genitals, where urine exits the body. It is part of the urinary tract system that in descending order includes the kidneys, ureters, bladder, and the urethra.
Which is bigger ureter or urethra?
The urethra is much wider than the ureters and kidney stones usually do not get stuck in the urethra.
Where is the male urethra?
The male urethra originates at the bladder neck and terminates at the urethral meatus on the glans penis. It is roughly 15-25 cm long in the adult and forms an “S” curve when viewed from a median sagittal plane in an upright, flaccid position (see the image below).
Where are your ureters located?
Ureters connect the kidneys to the bladder. The upper half of each ureter is located in the abdomen and the lower half is in the pelvis.
What is the medical term for urethra?
Medical Definition of urethra : the canal that in most mammals carries off the urine from the bladder and in the male serves also as a passageway for semen. Other Words from urethra. urethral \ -thrəl \ adjective.
What is the structure of ureter?
Each ureter is a small tube, about 25 cm long, that carries urine from the renal pelvis to the urinary bladder. It descends from the renal pelvis, along the posterior abdominal wall, which is behind the parietal peritoneum, and enters the urinary bladder on the posterior inferior surface.