The Law of Laplace can be applied to bladder distension because it describes the relationship between the pressure inside a sphere and the tension in its walls.
In the case of the bladder, the bladder wall is a sphere-like structure that is subject to internal pressure as it fills with urine. According to the Law of Laplace, the tension in the bladder wall is directly proportional to the pressure inside the bladder and the radius of the bladder.
As the bladder fills with urine, the internal pressure increases, which in turn increases the tension in the bladder wall. However, the bladder wall is composed of smooth muscle tissue that is able to stretch and accommodate the increasing volume of urine. This allows the bladder to expand without a significant increase in tension, which would otherwise cause the bladder wall to rupture.
In summary, the Law of Laplace explains how the pressure inside the bladder and the tension in its walls are related during bladder distension. It helps us understand how the bladder wall is able to stretch and accommodate the increasing volume of urine without rupturing.