In this game the players race around major blood vessels gathering oxygen from the lungs and delivering it to the capillaries where it is exchanged for carbon dioxide. The cards are used to conserve oxygen by an activity such as sleeping or perhaps use it at an alarming rate due to stress. The winner of the game is the first player to return the carbon dioxide token to the lungs.

The game is recommended for children Ages 6 - 12, and its components include a game board, a dice, instructions, and token used to represent oxygen, red blood cells, and carbon dioxide.