Mitochondria, which are organelles responsible for producing energy in cells, utilize oxygen during cellular respiration. Therefore, the oxygen transported by the blood to body cells is essential for mitochondrial function and energy production.

Secondary meristem, located in the cortex of the plant, contributes to the formation of cork cells by generating layers of cells that constitute the cork, thus aiding in the development of the protective outer layer as the plant grows older. ...

Cork cells are dead and lack intercellular spaces, unlike most living plant cells. Additionally, they contain suberin in their cell walls, which adds to their impermeability.

Oxygen is absorbed in the lungs and then transported to all body cells through the bloodstream.

Muscle cells contract and relax, facilitating the movement of body parts such as the chest during breathing.