The bladder is an organ that is hallow. It is layered similar to a balloon
with several muscles that make up this organ. The muscle is a smooth muscle

The bladder is an important organ in the urinary system of both males and females.
It links the kidney and urethra in this system

Smooth muscle allows the bladder to enlarge when it becomes full and small when empty.
Overall the bladder can hold 400-620 ml but the maximum is twice this amount if
outflow is obstructed.

It is located on the pelvic floor of most humans and mammals

Muscle involvement is detrusor muscle

When bladder is stretched it sends a signal through the nervous system – a
parasympathetic response that allows urine to leave the bladder and travel to the urethra.

Sphincter control is essential

Incontinence can be as a result of problems with sphincter control.

The bladder is typically sterile – meaning without bacteria

Males: The bladder lies between the rectum and the pubic symphysis.
It is just above the prostate.

Females: The bladder lies just behind the uterus and near the vagina.