Science - Autumn 1 and 2 - Year 3 Science - The Digestive System and Teeth and Food Chains

Sep 28, 2026

Uploaded by Marglet

Year 3 science learning materials focusing on the digestive system and human teeth, using key vocabulary and simple explanations. Learners study the functions of mouth, teeth, salivary glands, tongue, oesophagus, stomach, liver, pancreas, small intestine, large intestine, rectum, and anus, including peristalsis and how long food travels after swallowing. The resource also covers different types of human teeth and their uses, then builds understanding of food chains, identifying producers, herbivores, carnivores, omnivores, predators and prey.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Key Vocabulary - Digestive System

Key Learning and Fascinating Facts

Key Vocabulary - Teeth and Food Chains

Human Teeth

Human Teeth - Key Learning

Food Chains - Key Concepts

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Year 3
Science – The Digestive System | | | | --- | --- | --- | --- | | Key Vocabulary mouth Where food enters the digestive system. teeth Tear, rip and chew food. salivary glands Produce saliva tongue Moves the food into a bolus and pushes it to the oesophagus. oesophagus A muscular tube which uses contractions to move the bolus from mouth to stomach. stomach Mix with acid and enzymes to turn food into a paste. liver Produces bile to break down fat. pancreas Produces enzymes which break down fats, proteins and carbohydrates. small intestine Absorbs nutrients from the food. large intestine Helps absorb water from the food. rectum Holds the stool until you go to the toilet. anus

Where the stool is released.

Are you a Milecastle Megamind?
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What is peristalsis? | Key Learning Describe the simple functions of the basic parts of the digestive system in humans.
Fascinating facts! Our stomach can stretch. An adult’s stomach can hold approximately 1.5 litres of food and drink. Our oesophagus is approximately 25cm long.

How long does it take for food to travel to the stomach once you have swallowed it? | Year 3 Science – Teeth and Food Chains | Key Vocabulary | | | --- | --- | | incisors | They are flat and sometimes described asa spade shape. They are used for biting and cutting food. | | canines | They are pointy and sometimes referred to as ‘fangs’. We use our canines to tear and rip food. | | pre-molars | They are small and have a flat top. They hold and crush food. | | molars | They are our largest teeth and have a flattop. They are used to grind out food before we swallow it. | | food chain | Living things which are linked together because each thing feeds on the one next to it in the chain | | herbivore | An animal that eats plants. | | carnivore | An animal that feeds on other animals. | | omnivore | An animal that eats plants and animals. | | producer | A plant that produces its own food. | | predator | An animal that hunts and eats other animals. | | prey | An animal that gets hunted and eaten by another animal. | Human Teeth | Key Learning | | --- | | Identify the different types of teeth in humans and their simple functions. | | Construct and interpret a variety of food chains, identifying producers, predators and prey. | The teeth of an animal are designed to eat different foods depending on the diet of the animal.

FAQs

What are the basic parts of the digestive system and what do they do?

The materials explain how each part contributes to digestion, including moving food, mixing it with acids and enzymes, and absorbing nutrients and water.

How do different types of human teeth help us eat?

The guide describes incisors for cutting, canines for tearing, pre-molars for holding and crushing, and molars for grinding food.

What is a food chain and how are producers, predators, and prey identified?

A food chain is a sequence of linked living things where each feeds on the next. Producers make their own food, predators hunt and eat other animals, and prey are the animals that get hunted and eaten.

Sep 28, 2026

Uploaded by Marglet