What animals eat
Four meals, four methods.
📚 Chapter Learning Kit
Life Processes in Animals · Class 7 Science · Curiosity
English 6 topics 210 leveled MCQs 102 flashcards 5 games Free
Shared by a Veda teacher · Generated with Veda AI · Oct 2026
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Energy from food
The shared purpose.
However different the meal, animals get the energy for every life process from what they eat.
Food is complex
Why anything has to happen at all.
Food holds carbohydrate, protein and fat. None can be used as it arrives; each must be broken into a simpler form.
Almost six metres
The name misleads.
The small intestine is nearly twice the height of your classroom, and it is the longest stretch of the whole canal.
Narrow, not short
So why small?
Its name describes how narrow it is. The large intestine is named for its width, not its length.
Three sources
Help arrives from three places.
📖 Smart notes
What you'll study, topic by topic
1
From the Mouth to the Stomach
Food is too complex to be used as it arrives, so a long tube takes it apart in stages. The first two stages are a set of teeth and a bag of acid.
- Animals obtain the energy for every life process from their food.
- Food holds complex components: carbohydrate, protein and fat.
- Those must be broken into simpler forms before a body is able to use them.
~40 min · full explanation, examples & memory tricks in the app
2
The Intestines, and What They Take In
the small intestine is the longest stretch of the canal and the one that hands food over to the blood. The large intestine is shorter, wider, and mostly in the business of reclaiming water.
- The small intestine is almost 6 metres long, the longest part of the canal.
- It takes secretions from its own lining, from the liver and from the pancreas.
- Bile from the liver is mildly basic and neutralises acid from the stomach.
~40 min · full explanation, examples & memory tricks in the app
3
Not Every Animal Digests Alike
A cow chews its food twice and a bird has no teeth to chew with at all. The same job gets done in three quite different places.
- Grass-eaters such as cows and buffaloes chew grass only partly at first.
- They swallow it, and partial digestion takes place in the stomach.
- The partly digested food comes back up to the mouth to be chewed again.
~35 min · full explanation, examples & memory tricks in the app
4
How We Breathe
Air has a fixed route in and out, and a muscle below the lungs does most of the pulling. A bottle, two balloons and a rubber sheet show exactly how.
- Breathing is the inhaling and exhaling of air, and all living beings respire.
- A body manages a week without food, but only minutes without breathing.
- Air enters through a pair of nasal openings called the nostrils.
~40 min · full explanation, examples & memory tricks in the app
5
What Respiration Does With the Oxygen
Breathing only moves air about. The useful work happens when oxygen meets glucose, and that is a different process with a different name.
- Lime water goes milky on meeting carbon dioxide.
- Exhaled air turns lime water milky, while inhaled air does not.
- So exhaled air holds more carbon dioxide than the air breathed in.
~40 min · full explanation, examples & memory tricks in the app
6
How Other Animals Breathe
A fish, a frog and an earthworm solve the same problem with three different surfaces. What all of them need is thin, wet and full of blood vessels.
- Lizards, snakes, birds, cows, goats, lions and elephants all use lungs.
- They all have lungs, but the structure of those lungs is quite different.
- Most aquatic animals, fish included, have gills instead.
~35 min · full explanation, examples & memory tricks in the app
❓ Leveled MCQ practice
Try the smart MCQs from this kit
210 questions laddered from warm-up to topper-level, each with an explanation. A taste:
A bee hovers at one flower while a sunbird dips its beak into another nearby. Both of them are taking their food by
Beginner
A swallowing prey whole
B filtering the water
C sucking nectar
D chewing leaves
Show answer & explanation
sucking nectar
Nectar is what a flower offers them.
A python catches an animal larger than its own head and does not chew at all. It takes its food by
Beginner
A swallowing the animal whole
B filtering the tiny particles of food that happen to be floating by
C sucking nectar
D drinking milk
Show answer & explanation
swallowing the animal whole
Snakes swallow the animals they prey upon.
Why do animals need food?
Beginner
A Because the alimentary canal would otherwise have nothing to do at all
B Because the teeth need something to crush and chew between the meals
C To keep them warm
D It gives them energy for life processes
Show answer & explanation
It gives them energy for life processes
Energy from food is what lets every life process go on.
Which three complex components does food hold?
Beginner
A Starch, iodine and mucus
B Carbohydrate, protein and fat
C Acid, juice and water
D Sugar, salt and oil
Show answer & explanation
Carbohydrate, protein and fat
All three have to be reduced to simpler forms.
🃏 Flashcards
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