Vesicula umbilicus is a medical term that refers to the urinary bladder. This organ is an essential part of the urinary system, which is responsible for removing waste products from the body. Some common synonyms for vesicula umbilicus include the bladder, cyst, and sacculus vesicae. Other related terms include urachus, which refers to the embryonic connection between the umbilicus and the bladder, and vesical, which is an adjective that describes something related to the bladder. Understanding these synonyms and related terms can be helpful when discussing conditions, functions, and treatments related to the urinary system and vesicula umbilicus specifically.