The urinary bladder is a large hollow, muscular organ that temporarily holds urine. It
is located retroperitoneally in the pelvis, and is posterior to the pubic symphysis. There
are three openings in the bladder, two of them are for the ureters, and one is for the urethra.
The triangular base of the bladder is known as the trigone. Most infections of the
bladder occur at the trigone.
The male prostate gland is located in the bladder near the urethra's opening. The walls
of the bladder are made up of three layers of muscle tissue. Collectively known as the
detrosur muscle. When the bladder is empty it is about 7.5 cm. to 5 cm. thick. As urine
collects in the bladder the walls expand and rise to a capacity of 500 ml. of urine, or
12.5 cm. thick. A filled bladder is firm and pear shaped. |
