The process of red blood cells getting oxygen?

Red blood cells (RBCs) transport oxygen from the lungs to tissues throughout the body. When inhaled, oxygen enters the alveoli in the lungs and diffuses into the blood, where it binds to hemoglobin molecules within the RBCs. This oxygen-rich blood is then pumped by the heart to various tissues, where oxygen is released and utilized for cellular respiration. The RBCs subsequently return to the lungs to pick up more oxygen, continuing the cycle.