Describe the steps of respiration in short.

(N/A) The process of respiration involves the following steps:
$1$. Breathing or pulmonary ventilation: Atmospheric air is drawn in,and $CO_2$-rich alveolar air is released out.
$2$. Diffusion of gases: Exchange of $O_2$ and $CO_2$ occurs across the alveolar membrane.
$3$. Transport of gases: $O_2$ and $CO_2$ are transported by the blood throughout the body.
$4$. Diffusion of gases: Exchange of $O_2$ and $CO_2$ occurs between the blood and the tissues.
$5$. Cellular respiration: Utilization of $O_2$ by the cells for catabolic reactions and the resultant release of $CO_2$.