The nose, pharynx, larynx, trachea and bronchi all work like a system of pipes through which the air is funnelled down into our lungs. There, in very small air sacs called alveoli, oxygen is brought into the bloodstream and carbon dioxide is pushed from the blood out into the air.
And, just to clarify, the kitty litter in your trunk, to be used for traction, needs to be taken out and spread around your tires. Most cars are front wheel drive, so the extra weight alone in the back ain't gonna do you much good.
If you happen to have a cat like a lot of people do, then you probably use kitty litter for its litter box. If you do then you can avoid the trip to the home and garden section of your favorite store, because used kitty litter is a repellent of woodchucks.