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TEAS ScienceWhere each nutrient is taken up

Nutrient AbsorptionATI TEAS 7 cheat sheet

Where each nutrient is taken up

7 key facts 5 practice questions Reviewed Oct 2026
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Small Intestine

  • Duodenum — iron, calcium, most minerals
  • Jejunum — sugars, amino acids, vitamins
  • Ileum — bile salts and vitamin B12

Large Intestine

  • Absorbs water and electrolytes
  • Gut bacteria make vitamin K

Surface Area

  • Villi and microvilli multiply the absorbing surface enormously

Transport

  • Sugars and amino acids enter the blood; most fats enter the lymph
Key takeaway

Where each nutrient is taken up

Before you read

Test yourself first: 5 questions

Question 1 of 5

The tiny finger-like projections that increase the small intestine's surface area for absorption are:

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