The digestive system works closely with the circulatory system to ensure your body gets nutrients from the food you eat. Here's how:

* Digestion: The digestive system breaks down food into smaller molecules that the body can absorb.

* Absorption: These smaller molecules are absorbed into the bloodstream through the lining of the small intestine.

* Circulation: The circulatory system, which includes the heart, blood vessels, and blood, then transports these nutrients throughout the body to reach all the cells and tissues that need them.

So, the digestive system provides the nutrients, and the circulatory system acts as the delivery service.