Trace blood from the respiratory system to cardiovascular system out the urinary system

The respiratory system is responsible for the exchange of gases between the body and the environment. Oxygen is taken in and carbon dioxide is released. The oxygenated blood from the lungs is carried by the pulmonary veins to the left atrium of the heart. From there, it flows into the left ventricle and is pumped out to the rest of the body through the aorta.

The cardiovascular system is responsible for transporting blood throughout the body. The blood carries oxygen, nutrients, and other substances to cells and tissues, and removes waste products.

The urinary system is responsible for removing waste products from the body. Blood from the renal artery enters the kidneys, where it is filtered to remove waste products such as urea and excess water. The filtered blood then leaves the kidneys through the renal vein.

Therefore, tracing blood from the respiratory system to cardiovascular system out to urinary system would involve following a path from lungs to pulmonary veins to left atrium to left ventricle to aorta to cells and tissues of body to renal artery to kidneys to renal vein.