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When does food become nutrients your body can use?

Breaking food down and moving its nutrients into the body are different steps. Digestion prepares components such as carbohydrates for absorption, while the intestinal wall provides the route into circulation.

4–5 min

Questions you could explore

  • What must happen to a starch before its products can be absorbed?
  • Why do different nutrients not all follow an identical route?

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How does a vaccine give the immune system a memory?

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2–3 min

Why won’t an antibiotic treat a viral cold?

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