- Science
- Ages 7–9
- 14 min
- Beginner
Our Body
Meet the amazing body team—organs, bones and muscles working together every day.
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What is Our Body?
Your body is always at work. Even while you are reading, your brain is making sense of words, your lungs are bringing in oxygen, your heart is pumping blood, and your muscles are holding you upright.
These parts belong to body systems—teams of organs and tissues that work together. Learning their main jobs helps us understand movement, breathing, digestion and healthy habits.
What you will learn
- Name five important organs and tell one job each does
- Explain how the brain, nerves, muscles and bones help the body move
- Put the main stops in the food journey in order
- Choose daily habits that help care for the body
Key words
- Organ
- A body part inside you that has a special job. The heart, lungs and stomach are organs.
- Brain
- The body's control centre. It helps you think, remember, feel and send messages to other body parts.
- Heart
- A strong muscular organ that pumps blood around the body.
- Lungs
- Two organs in the chest that bring oxygen into the body when you breathe in.
- Digestion
- The way the body breaks food into nutrients it can use for energy, growth and repair.
Meet the organ team
The brain is the body's control centre. It helps with thinking, memory, feelings and movement. Nerves carry messages between the brain and the rest of the body.
The lungs bring oxygen into the body when you breathe in and send carbon dioxide out when you breathe out. The heart is a strong muscle that pumps blood. Blood carries oxygen and nutrients to body parts that need them.
The food journey
Digestion starts in the mouth. Teeth break food into smaller pieces, and saliva helps make it easier to swallow. The food pipe, also called the oesophagus, carries food to the stomach.
The stomach mixes and breaks food down further. The small intestine takes nutrients into the blood. The large intestine takes in water from what is left before the waste leaves the body.
Bones and muscles
Your skeleton is the framework of bones inside your body. It gives shape and support. It also protects soft organs. The skull protects the brain, and the ribs help protect the heart and lungs.
Muscles help make movement. Many muscles are attached to bones. When a muscle tightens, it pulls on a bone across a joint. Muscles and bones work as a team when you walk, write, smile or jump.
Care for your body
No single habit does every job. A varied diet and water provide useful nutrients and fluids. Active play strengthens muscles and bones. Sleep gives the body time to rest and grow.
Clean hands help stop germs from spreading. Remember the five steps: wet, lather with soap, scrub, rinse and dry. Wash before eating and after using the bathroom.
Diagram
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Common questions
What are the main organs children learn about in Class 3?
This lesson introduces the brain, lungs, heart, stomach and intestines. Each has a special job, and they work together as part of larger body systems.
What does the heart do?
The heart is a strong muscular organ that pumps blood around the body. Blood carries oxygen and nutrients to body parts and carries carbon dioxide toward the lungs.
How do bones and muscles help us move?
Bones support the body and meet at joints. Many muscles pull on bones when they tighten, making body parts bend, straighten and move.
Where does food go after we swallow it?
Food moves down the food pipe to the stomach. It then reaches the small intestine, where nutrients are absorbed, and the large intestine, where water is absorbed from what remains.
Which habits help keep the body healthy?
Eating varied foods, drinking water, enjoying active play, getting enough sleep and washing hands with soap all help care for different parts of the body.
Ready to explore it?
The interactive lesson walks through Our Body step by step, with animations you control.
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