Animals: digestion & nutrition

The digestive system, food groups, and types of teeth

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Try each question. If you're stuck, leave it and come back. The answer key is on the last page.

1
Put the parts of the digestive system in the order food passes through them. Put these in order: Stomach, Large intestine, Mouth, Small intestine, Oesophagus
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2
Label the parts of the digestive system.
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3
What is the main function of the small intestine? A) To absorb nutrients into the blood B) To chew food into smaller pieces C) To store food before digestion D) To absorb water from waste
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4
Which type of teeth are used for tearing food? A) Canines B) Incisors C) Molars D) Premolars
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5
A herbivore has flat, wide molars. Why is this shape useful? A) To grind tough plant material B) To tear meat apart C) To catch live prey D) To drink water quickly
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6
Put these food groups in order from the one we need most of to the one we need least of on the Eatwell plate. Put these in order: Oils and spreads, Fruit and vegetables, Proteins, Starchy carbohydrates
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7
True or false? The large intestine is longer than the small intestine. A) True B) False
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8
Label the types of teeth in the human mouth.
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9
True or false? Eating too much sugar can lead to tooth decay. A) True B) False
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10
Where in the digestive system are tiny finger-like projections called villi found, which absorb nutrients? A) Small intestine B) Stomach C) Mouth D) Liver
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Answer key

Animals: digestion & nutrition · for parents and teachers

1
Mouth, Oesophagus, Stomach, Small intestine, Large intestine
Food travels: mouth (chewing) - oesophagus (food pipe) - stomach (acid breaks it down) - small intestine (nutrients absorbed) - large intestine (water absorbed).
2
z1: Mouth; z2: Oesophagus; z3: Stomach; z4: Small intestine; z5: Large intestine
The digestive system is a long tube from mouth to large intestine. Each part has a specific job in breaking down food.
3
To absorb nutrients into the blood
The small intestine is where most nutrients from digested food pass through the intestine wall into the bloodstream.
4
Canines
Canines are the pointed teeth next to your incisors. They are designed for gripping and tearing food, like meat.
5
To grind tough plant material
Herbivores need large, flat molars to grind plant material like leaves and grass, which are tough and need lots of chewing.
6
Starchy carbohydrates, Fruit and vegetables, Proteins, Oils and spreads
A balanced diet has mostly starchy carbohydrates and fruit/vegetables, moderate protein, and small amounts of oils and spreads.
7
False
The small intestine is actually much longer (about 6 metres) than the large intestine (about 1.5 metres). 'Small' refers to its narrower width.
8
z1: Incisors; z2: Canines; z3: Premolars; z4: Molars
Incisors (front, flat, for cutting), canines (pointed, for tearing), premolars (two points, for crushing), and molars (large, flat, for grinding).
9
True
True. Bacteria use sugar to make acid that wears away tooth enamel, causing decay.
10
Small intestine
The small intestine is lined with villi, which greatly increase the surface area for absorbing nutrients into the blood.