What role does your heart play in delivering oxygen to your body cells?

the heart breaks down carbon dioxide into carbon and oxygen.

the heart pumps oxygen-rich blood to your body cells.

the heart pumps oxygen through the alveoli, which deliver it to body cells.

the heart takes in oxygen from the environment and delivers it to cells.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.