What did the apatosaurus have in its stomach to help its grind up food?

The Apatosaurus, like many sauropods, is believed to have had gastroliths in its stomach. Gastroliths are stones that the dinosaur ingested to aid in the mechanical breakdown of tough plant material, helping to grind up food as it passed through the digestive system. This adaptation was crucial for efficiently processing its herbivorous diet, allowing it to extract nutrients from fibrous plants.