What structure connects the apex of the urinary bladder to the umbilicus?

What structure connects the apex of the urinary bladder to the umbilicus?

• A. Urachus
• B. Ureter
• C. Urethra
• D. Bladder neck

Answer: (A)

The urachus. In development, a canal connects the bladder apex to the umbilicus, formed from the allantois. After birth it usually becomes a fibrous cord called the median umbilical ligament, extending from the bladder apex to the umbilicus along the inner lining of the anterior abdominal wall. This is different from the ureter, which carries urine from the kidneys to the bladder; the urethra, which carries urine out of the body; and the bladder neck, which is the junction with the urethra.

The urachus. In development, a canal connects the bladder apex to the umbilicus, formed from the allantois. After birth it usually becomes a fibrous cord called the median umbilical ligament, extending from the bladder apex to the umbilicus along the inner lining of the anterior abdominal wall. This is different from the ureter, which carries urine from the kidneys to the bladder; the urethra, which carries urine out of the body; and the bladder neck, which is the junction with the urethra.