Which system works closely with the respiratory system to transport oxygen?

The cardiovascular system works closely with the respiratory system to transport oxygen throughout the body. When we breathe in, oxygen enters the lungs and is exchanged for carbon dioxide in tiny air sacs called alveoli. The oxygen that is absorbed into the bloodstream binds to hemoglobin molecules in red blood cells. The cardiovascular system, comprising the heart and blood vessels, is responsible for circulating these oxygenated red blood cells to tissues and organs, ensuring they receive the oxygen needed for cellular respiration and overall function.

This close relationship is essential because the efficiency of oxygen transport directly impacts how well the respiratory system delivers oxygen to the body, thus supporting various physiological processes. Understanding this relationship highlights the interdependence of these systems in maintaining homeostasis within the body.