How does the Diaphragm work in circulatory system?

The diaphragm does not work in circulatory system. The diaphragm functions as a boundary muscle between the chest and abdominal cavities. It supports lungs, assists with breathing, and aids the digestive process by controlling pressure within the abdominal cavity. The circulatory system refers to the network of vessels, including the heart, that pump and regulate the flow of blood, transporting nutrients and oxygen throughout the body.