🐾 Animal Systems & Behaviour: How Animals Work and Act
Discover how animals' body systems keep them alive and how their behaviours help them survive, find food, and stay safe!
Learning Goals
By the end of this lesson, you will be able to:
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Identify the main body systems that keep animals alive
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Explain how different body systems work together
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Describe animal behaviours that help them survive
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Give examples of how animals respond to their environment
Before You Start
Before this lesson, you should know:
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You should know that all living things need food, water, and air
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You should know that animals have body parts like hearts, lungs, and stomachs
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You should know the difference between a living thing and a non-living thing
Make sure you are comfortable with these ideas first.
Key Words
Important words to know for this lesson:
System
A group of body parts that work together to do a big job, like the digestive system that breaks down food.
Behaviour
The way an animal acts, like a dog wagging its tail or a bird building a nest.
Instinct
A behaviour an animal is born knowing how to do, without being taught — like a spider spinning a web.
Survival
Staying alive by getting food, water, and shelter and avoiding danger.
Respond
To react to something happening around you, like a cat jumping at a loud noise.
How Animal Systems Work Together
Animals have body systems — groups of organs and parts that work together to help the animal survive, grow, and respond to its environment.
Digestive System: Breaks down food into energy and nutrients the animal's body can use — like a food-processing factory! 🍎
Nervous System: The brain and nerves send messages around the body, helping animals sense things and react quickly to danger or food.
Muscular & Skeletal System: Bones give the body shape and support, while muscles pull on bones to create movement — like a puppet and its strings! 🦴
Circulatory System: The heart pumps blood through the body, delivering oxygen and nutrients to every cell, like a delivery truck network. ❤️
Systems Working Together: No system works alone — for example, when a dog runs, the nervous, muscular, skeletal, and circulatory systems all cooperate at the same time.
Example
When a frog spots a fly, its nervous system detects the movement, its muscular system launches its tongue, and its digestive system breaks down the meal — all in seconds! 🐸
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A simple animal body diagram showing five key systems — circulatory, nervous, digestive, muscular, and skeletal — and how they are all part of one body working together.
Let's Try It Together!
Basic
A rabbit hears a hawk's cry. Which body system helps the rabbit sense the danger, and what behaviour might it show?
Let's Try a Harder One!
Intermediate
A deer is running away from a wolf. Name two body systems working together and explain how each helps the deer escape.
Your Turn to Practice
Try this one yourself — use the hint if you get stuck:
A turtle feels cold water around it. What behaviour might the turtle show to warm up, and which sense helped it notice the cold?
In the Real World
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Birds flying south for winter is a behaviour called migration — they travel to warmer places to find food!
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Bears eat lots of food in autumn, then hibernate (sleep) all winter to save energy.
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Bees do a wiggly 'waggle dance' to tell other bees where to find the best flowers.
Quick Check
Test your understanding — tap an answer to check:
Q1.Which body system helps an animal break down food for energy?
Q2.What is a learned behaviour?
Q3.Why do some animals hibernate in winter?
Challenge Question
Optional
Stretch your brain — this one's a bit harder!
A wolf's body has a respiratory system (for breathing), a digestive system (for food), and a nervous system (for the brain). If a wolf is chasing a deer, name one way each of these three systems helps the wolf during the hunt.
Key Takeaways
1.Animals have body systems (like digestive, respiratory, and nervous systems) that work together to keep them alive.
2.Instinct is a behaviour animals are born with, while learned behaviours come from experience.
3.Behaviours like migration and hibernation help animals survive changing seasons and find food.
4.All of an animal's systems and behaviours work as a team to help it survive in its environment.
Printable Cutouts
Matched to this lesson — untick anything you don't need, then print.
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Ready to Practice?
Now that you've learned Animal Systems & Behaviour, put it to the test with a quick quiz!