Supplies blood to the tissues of the heart .. pleazee what's the word in the blank

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.