The first coiled portion of the renal tubule is known as the
___________________________________. The hairpin-shaped portion of the renal
tubule is known as the
. The second coiled portion is
known as the
The distal convoluted tubules of several nephrons empty into a
tubule. The urine is then passed from the collecting tubule at the
medullary pyramid. Several collecting tubules are present in each
is a hollow sac within the sinus of the kidney called the
. The ureter then
drains the urine from the
What are ureters?
What mechanism is used by ureters to move urine?
11. The urinary bladder is a muscular organ for
ing the urine.
The triangular base of the urinary bladder is known as the
. The two
posterior corners of the trigone are the points where the
empty into the
bladder. The anterior corner of the trigone is the opening of the
endings stimulated by the stretching of the bladder walls are known as
What is the urethra?
At what part of the urinary bladder does the urethra begin?
There is an
urethral sphincter and an
urethral sphincter. The
internal urethral sphincter is located in the
of the urinary bladder. It is
controlled by nerves of the
nervous system. The external urethral
sphincter is more inferior, in the area of the
. It is controlled by nerves
13. The female urethra is
The male urethra is much longer and has two
. The female urethra serves
function. The male urethra serves both the