Science · Year 4

Teeth, Digestion and a Healthy Diet

🔬 ScienceMedium14 min

Story time 📖

Tap play and I''ll read this lesson to you like a story.

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🍕 into a of . Your through the , your the around, and you but where does it go ? Your is like an with a . we are to all the way through your , your , and how the your !

🔢 Your the from to is about 9 when out. That is the of a bus!

into to into your and every in your . It in . Each of the has a job, a bit like on a . Let us them in !

PartWhat it does
MouthTeeth chew food into smaller pieces; saliva (spit) starts breaking down starchy food
OesophagusA muscular tube that squeezes chewed food down to the stomach — like squeezing toothpaste
StomachChurns food and mixes it with acid to break it down into a thick liquid
Small intestineAbsorbs goodness (nutrients) from the liquid food into the blood
Large intestineAbsorbs water; turns what is left into waste (poo) ready to leave the body
The main parts of the digestive system and their jobs
Food travels through the digestive system in order, from the mouth to the large intestine.

🧩 Put these stages of digestion in the correct order, starting with the mouth. Drag them into place! 🍽️

  1. Large intestine — water is absorbed and waste is formed
  2. Small intestine — nutrients pass into the blood
  3. Stomach — food is churned and mixed with acid
  4. Oesophagus — food is squeezed down to the stomach
  5. Mouth — teeth chew and saliva begins digestion

🦷 in your , so let us a at your ! have of and each one has a for a job. have 20 , which are by 32 () . is it is just your for , !

🔗 Match each type of tooth to its job. Can you remember them all? 🦷

  • Incisors

  • Canines

  • Premolars

  • Molars

🪥 your for two , a day! in your on and make that into your the of . the before they can ( in your ).

Now let us about the you put into this your . A the of so your it needs. of your like a car: it needs the of to run . Too much of one thing or too of another and the !

Food groupExamplesWhy we need it
CarbohydratesBread, pasta, rice, potatoesMain source of energy — fuel for moving and thinking
ProteinsMeat, fish, eggs, beansBuild and repair muscles and other body tissues
FatsButter, nuts, oily fishStore energy and help the brain and nerves work
Vitamins and mineralsFruit, vegetables, dairyKeep bones, skin, blood and the immune system healthy
FibreWholegrain bread, vegetablesKeeps food moving smoothly through the digestive system
WaterWater, milk, fruitCarries nutrients around the body and removes waste
The main food groups and why your body needs them

🗂️ Sort these foods into the correct food group. Drag each one to the right category! 🥦🍗🍞

  • Brown rice 🍚

  • Pasta 🍝

  • Chicken 🍗

  • Eggs 🥚

  • Broccoli 🥦

  • Oranges 🍊

🌟 a of and your of and . say: eat a ! Each in a or .

✍️ Use the word bank to complete these key facts about digestion and diet. 🧠

The into at the of . The into the . to and . through the .

🎉 ! you have the of from your very all the way to the . You have the of and the job each one does, and you have why a with the mix of , , , , , and your it needs to , and . Now with the !

Quiz time! 📝

Teeth, Digestion and Healthy Diet — Quiz

Question 1 of 5

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Which of the into the ?

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