Prostate
The tissue type in the human urethra is transitional: it changes from stratified columnar epithelium in the first part to stratified squamous epithelium in the last parts.
corpus spongiosum also known as the spongy (penile) urethra
corpus spongiosum
Corpus spongiosum
Prostate
There is no gland that encircles the bladder. The prostate gland sits at the base of the bladder; maybe that is what you were referring to.
The prostate gland encircles the neck of the bladder in teh male.
The prostate is encased in a layer called the capsule (which is tough muscle-like material) and this is part of the prostate, so it is not a separate structure.
The prostate gland
The bulbourethral gland secretes into the urethra.
Bulbourethral gland
The prostate gland.
Cerebral arterial circle or circle of Willis
The prostate gland encircles the bladder neck at the base of the men's bladder.
prostate
In cats the prostate gland is relatively smaller than humans. In cats it lies posterior to the urethra. Whereas in humans the gland surrounds the urethra.
The urethra passes through the prostate and the penis in the male.