What other major body system is a DIGESTIVE system working with closely?

circulatory system

Explanation:

Where do you think the nutrients from the food that you eat go after digestion? The entire point of eating is to get energy and nutrients tot he other parts of the body and to do that you need the circulatory system.

The digestive system works very closely with the circulatory system to get the absorbed nutrients distributed through your body. The circulatory system also carries chemical signals from your endocrine system that control the speed of digestion.

Explanation:

the trilobite is used as an index fossil for various geologic time periods as specific types of the trilobites were present in different geological time periods. they are a group of marine arthropods belonging to the class of trilobita.

explanation:

the answer is c) abandoned properties that are contaminated with hazardous materials.