How do you calculate the volume of a bladder?

To calculate the volume of a bladder, you can use the water displacement method. Fill the bladder with water until it is full, then pour the water into a measuring container to determine the volume. Alternatively, if you know the dimensions of the bladder, you can use geometric formulas based on its shape (e.g., for a spherical bladder, use the formula (V = \frac{4}{3} \pi r^3)). Make sure to convert all measurements to the same units before calculating.