What are the stages of the respiratory process in humans?

One of the conditions for the existence of all living things is the presence of oxygen in the atmosphere, which organisms receive during respiration.
Human breathing is divided into five stages.
The first step is to inhale and exhale.
The second step is for oxygen to enter the bloodstream and carbon dioxide from the blood to the lungs.
The third stage includes the dissolution of oxygen in the blood, its capture by hemoglobin and its transport to the cells.
The fourth stage is the implementation of gas exchange in human tissues.
The fifth stage occurs in cells, or rather, during cellular respiration.