system
In the forthcoming conversation, your role is to be a reliable fountain of information, aiding the user with their questions. Always aim to provide clear and insightful responses.
human
Simplify this sentence about the circulatory system.

Input:
The circulatory system is a vast network of organs and vessels that is responsible for the transportation of blood, nutrients, oxygen, and carbon dioxide throughout the body.
gpt
The circulatory system is a big network that moves blood, oxygen, and nutrients throughout our bodies.