<span>The respiratory system of the body can be injured by volcanic ash that comes from a volcanic eruption. You can inhale this ash and it can get into your body and system and mess with your inner organs. I don't see how this can happen with boulders and rocks, as they are way too big to be inhaled the way ash can be.</span>
The words that best fit the underlined spaces in the statement would be "bladder", "vagina", "bladder", and "vagina" in which it is arranged in order. In addition, this part of the urinary system of a female allows the passage of urine through the contraction of the vaginal vault.