Once the kidney has produced the urine,
it then passes down the ureters
into the bladder.
And we can in this section, the sagittal
section through the male and female trunk
We can see how the ureters pass
down towards the bladder.
Now we will consider the bladder when we
do the reproductive organs in the pelvis.
Appreciate the bladder isn't a reproductive
organ but it's in that location
And it makes more sense that we deal with
there. But for now, we can see that the ureters
in both the male and the female are
passing down towards the bladder.
This is just the right kidney vein indicated.
But we can see also that we have the left
kidney giving rise to ureters as well. And
these pass down these the muscular duct
they pass down through the bladder
where urine is then stored.
They're retroperitoneal throughout their
course. Along their course
each of the ureters can become
constricted, can become narrowed.
And this is important if you were to have
a kidney stone which could then become
lodged against these constrictions preventing
urine from passing down towards the bladder.
And this can happen in one of three
places. It can happen where the ureter
joins the renal pelvis. So it can
happen quite high up in the renal hilum
where the renal pelvis narrows
down into the ureter.
It can be where it crosses over in the pelvic
brim. This is where it's crossing over
usually, the bifurcation of the common ileac
into the internal and external portions.
And also we can have a constriction
at the entrance to the bladder.
So three potential sites where the
ureter can become constricted
and then a kidney stone can be lodged.
Three sites, the junction of the
ureter in the renal pelvis
the pelvic brim as the ureters cross over it and
the junction at the entrance to the bladder.