According to the "law of urinating" all mammals, regardless of size, is completely emptied the bladder for 21 seconds Bashny.Net

And the elephant and the little mouse ...



A group of scientists conducted a study at the Zoo Atlanta with the aim to find out how fast the animals urinate. They found that the vast majority of mammals, regardless of their size urinate an average of 21 seconds of, although bladder capacity ranging from 100 ml to 100 liters.

Scientists have named his discovery "law urination": it consists in the fact that the urinary system in the evolution of mammals evolved to output fluid from the body as quickly as possible and more efficient.

Big animals have big urethra, reinforcing the force of gravity and speed of urination. Thus, the urethra is effectively turned to an apparatus for increasing the flow of urine, urinary system that allowed to grow without affecting its basic function.

via factroom.ru