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      Writing the second section of an explanation text about the digestive system

      Lesson details

      Learning outcome

      I can write detailed paragraphs to explain what happens to food when it leaves the stomach.

      Key learning points

      1. The main paragraphs in an explanation text tell the reader how the process of digestion is carried out.
      2. Subject-specific, scientific vocabulary ensures the reader learns accurate information.
      3. Fronted adverbials of cause and viewpoint are an important part of explanation texts and support text flow.
      4. Using a variety of simple, compound and complex sentences helps to effectively communicate the process being explained.
      5. Adverbial complex sentences and relative complex sentences are a key part of explanation texts and support text flow.

      Keywords

      • Subject-specific vocabulary - vocabulary used when writing about a particular subject

      • Fronted adverbial of cause - a sentence starter that tells the reader the cause and effect of something

      • Viewpoint fronted adverbial - a sentence starter that introduces facts and emphasises the writer's opinion

      • Complex sentence - a sentence formed of at least one main clause and a subordinate clause

      Common misconception

      Pupils might include steps in the process from when the food arrives in the mouth.

      This section of the explanation text is about what happens after the food leaves the stomach.

      Teacher tip

      Ensure children are confident with the grammar involved in this lesson. You may want to precede the lesson with discrete grammar teaching.

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which body parts are involved in the digestive process?

      Correct answer: oesophagus
      heart
      Correct answer: stomach
      Correct answer: intestines
      lungs

      Q2.
      Match the sentence types to the correct definitions.

      Correct Answer:A simple sentence is,a sentence about one idea that make sense.

      a sentence about one idea that make sense.

      Correct Answer:A compound sentence is,formed of two main clauses and a joining word.

      formed of two main clauses and a joining word.

      Correct Answer:A complex sentence is,formed of at least one main clause and a subordinate clause

      formed of at least one main clause and a subordinate clause

      Q3.
      Match the vocabulary to the correct examples given.

      Correct Answer:coordinating conjunction,and, or, but, yet

      and, or, but, yet

      Correct Answer:subordinating conjunction,when, because, as, after

      when, because, as, after

      Correct Answer:ordering fronted adverbial,first, next, then, finally

      first, next, then, finally

      Q4.
      What type of subject-specific vocabulary do you need to use when writing about the human digestive system?

      Correct answer: scientific vocabulary
      historical vocabulary
      geographical vocabulary
      technological vocabulary

      Q5.
      Which of the following features are used to structure an explanation text?

      Correct answer: paragraphs
      stanzas
      Correct answer: headings and sub-headings
      Correct answer: introduction and conclusion
      chapters

      Q6.
      Which of the following are examples of a complex sentence?

      Correct answer: The stomach, which is the organ that stores food, expands as it fills.
      The stomach expands as it fills.
      Food moves down towards the stomach.
      Correct answer: As the oesophagus contracts and relaxes, food moves down towards the stomach.

      6 Questions

      Q1.
      Which body parts are involved in the digestive process when food leaves the stomach?

      Correct answer: large intestine
      oesophagus
      Correct answer: small intestine
      Correct answer: bloodstream
      throat

      Q2.
      Match the sentence types to their uses.

      Correct Answer:ordering fronted adverbial,used to tell the reader the order of events of a process

      used to tell the reader the order of events of a process

      Correct Answer:fronted adverbial of place,used to tell the reader where something is or happens

      used to tell the reader where something is or happens

      Correct Answer:fronted adverbial of cause,used to tell the reader the cause and effect of something

      used to tell the reader the cause and effect of something

      Correct Answer:viewpoint fronted adverbial,used to introduce facts and emphasise the writer's opinion

      used to introduce facts and emphasise the writer's opinion

      Q3.
      Which of the following are examples of fronted adverbials of cause?

      Correct answer: As a result,
      Eventually,
      Significantly,
      Correct answer: Consequently,
      Interestingly,

      Q4.
      Which of the following are examples of viewpoint fronted adverbials?

      Because of this,
      Correct answer: Significantly,
      Finally,
      Correct answer: Impressively,
      As a result of this,

      Q5.
      Which of the following is an example of an adverbial complex sentence?

      Correct answer: When the food is absorbed into the bloodstream, the body receives nutrients.
      The body receives nutrients through the bloodstream.
      The food is absorbed into the bloodstream.
      Nutrients, which comes from the food, is delivered through the bloodstream.

      Q6.
      Which of the following is an example of a relative complex sentence?

      Correct answer: The small intestine, which receives food from the stomach, absorbs nutrients.
      The small intestine receives food from the stomach.
      The small intestine absorbs nutrients from the food.
      When the small intestine receives food from the stomach, it absorbs nutrients.

      To help you plan your 4 English lesson on: Writing the second section of an explanation text about the digestive system, download all teaching resources for free and adapt to suit your pupils' needs...