Answer: vesicles

AnswerCrossword Clue
VESICLESBlisters
VESICLESRock cavities
vesiclesa membranous and usually fluid-filled pouch (as a cyst, vacuole, or cell) in a plant or animal
vesiclespocket of embryonic tissue that is the beginning of an organ
vesiclessmall abnormal elevation of the outer layer of skin enclosing a watery liquid blister
vesiclessmall cavity in a mineral or rock
vesiclesVESICLE, a small bladder, also VESICULA