The respiratory system has many parts, including the nose, throat (pharynx and larynx), windpipe, and lungs. Air comes in through the nose and is then carried down into the lungs, through a process referred to as inspiration. In the lungs, the oxygen is transferred to the red blood cells. The red blood cells then carry the oxygen to other organs in the body. This is all part of the physical process of a healthy body.
The Russian blue is a sweet-tempered, loyal cat who will follow her owner everywhere, so don't be surprised if she greets you at the front door! While she has a tendency to attach to one pet parent in particular, she demonstrates affection with her whole family and demands it in return. It's said that Russian blues train their owners rather than the owners training them, a legend that's been proven true time and again.