How does earthworm take in and digest food?

Earthworms take in food through their mouth, where they consume organic matter and soil. The ingested material then travels through the esophagus to the crop, where it is stored, and then to the gizzard, which grinds the food. Digestive enzymes break down the organic matter in the intestine, allowing the earthworm to absorb nutrients through its skin into the bloodstream. The remaining undigested material is excreted as castings, enriching the soil.