Mitochondria are tiny compartments inside the body's cells that are often referred to as the cell's batteries or energy factories. (susancnt.com)
Tri-fold wallet for kids has a large pocket for paper money, a small zipper pocket to neatly store the coins found under the couch cushions, and several other tiny compartments to hold Home Depot receipts, pretend driver licenses, and of course lots of wiggly bugs he finds in the yard - eew! (gatortots.com)
Hamsters run miles and miles in the wild, so they need a continuous running space, not a lot of tiny compartments connect together. (wikihow.com)