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The diagram shows part of the human digestive system - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Question 6
The diagram shows part of the human digestive system. (i) Complete the sentence by putting a cross (✗) in the box next to your answer. The pancreas in the diagram ... show full transcript
Worked Solution & Example Answer:The diagram shows part of the human digestive system - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Step 1
Step 2
Describe the function of the small intestine.
Answer
The small intestine plays a crucial role in digestion and nutrient absorption. It is where most of the digestion of food occurs.
Key Functions:
- Enzyme Action: The small intestine receives digestive enzymes from the pancreas and bile from the liver, which help break down food further.
- Nutrient Absorption: The walls of the small intestine are lined with villi and microvilli, which increase the surface area for absorption. This allows the nutrients from digested food to enter the bloodstream efficiently.
- Final Stage of Digestion: Carbohydrates, proteins, and fats are broken down into their basic units—simple sugars, amino acids, and fatty acids—before they are absorbed.
In summary, the small intestine is essential for digesting food and absorbing necessary nutrients into the body.