What is the bladder?
The bladder is a balloon-like organ which collects and stores urine. It lies in the lower part of the abdomen (the pelvis) and is predominantly made of a smooth muscle (called detrusor muscle).
The bladder is lined by a urine-proof layer called urothelium which prevents the urine form being reabsorbed by the body. The urothelium is made of a special type of cells called transitional cells.
Common bladder conditions