Describe what is happening in your cardiovascular system when you are increasing blood flow?

During exercise stroke volume increases because more blood is sent back to the heart due to the muscles squeezing blood in the veins

The heart and the circulatory system are responsible for moving blood throughout the body. As the heart beats in the chest, it pushes blood out through arteries to nourish cells with oxygen and nutrients. When you are increasing blood flow, the circulatory system pushes more blood throughout your body which causes your heart to beat faster in order to push more blood and nourish your body.