- The statement "Metal is an electrical conductor " is irrelevant

- Heart pumps blood to the rest of the body
- Blood is a vehicle for carrying oxygen from the lungs to the rest of the body
- Hence, the heart pumping blood transports oxygen to the rest of the body

- The heart pumping blood transports oxygen to the rest of the body
- If something is transported to something else then that something else receives that something
- Hence, the heart pumping blood causes the rest of the body to recive oxygen

- The heart pumping blood causes the rest of the body to recive oxygen
- As the rate of a heart beating increases , the rate of the blood traveling to the rest of the body will increase
- So, as the rate of heart beating increases, the amount of oxygen being recived by the rest of the body increases

- Muscle cells are a part of muscles
- Muscels are a part of the body
- So, muscle cells are a part of the body

- As the rate of heart beating increases, the amount of oxygen being recived by the rest of the body increases
- Muscle cells are a part of the body
- So, as the rate of heart beating increases, the amount of oxygen being recived by muscle cells increases

Therefore, as the rate of heart beating increases, the amount of oxygen being recived by muscle cells increases
Q: When Javier exercises, his muscle cells need more oxygen. Which would help Javier's muscle cells receive more oxygen?
Context:
- Metal is an electrical conductor 
- As the rate of a heart beating increases , the rate of the blood traveling to the rest of the body will increase 
- Heart pumps blood to the rest of the body 
- Muscle cells are a part of muscles 
- Blood is a vehicle for carrying oxygen from the lungs to the rest of the body 
- If something is transported to something else then that something else receives that something 
- Muscels are a part of the body