Actually cell can get big but they are smart enough to stay small and live off lots of small food, and there isn't enough food for them to live off of (if this is wrong i apologize)
I will try to give you the best answer by completing your statement.
During a marathon, approximately 99% of your muscles needs are met by the OES or Oxygen Energy System. Energy systems are the ones encharge of distributing the energy you need for a certain act.
Answer: If it involes weight, emotions, etc.
Explanation:
Answer:
safety, cost, and consumer testing.
Answer:
you breathe in, it fills your lungs, you breathe out
Explanation:
