Body systems
How do humans digest food?
From chewing to pooing. Learn how our bodies get what they need from food. Bitesize 2nd Level Science guide on the digestive system for Scotland's Curriculum for Excellence (CfE).
What does the heart do?
Learn how the heart pumps blood round the circulatory system to deliver oxygen and nutrients. Bitesize 2nd Level Science guide for Scotland's Curriculum for Excellence (CfE).
How do different animal circulation systems work?
Find out about the different ways blood circulates around mammals, fish and insects.
How do plants get energy and food to grow?
Learn about photosynthesis and respiration, and how plants gain nutrients to grow.
How do humans breathe?
Learn about human lungs, respiration system, breathing in oxygen and breathing out carbon dioxide. Bitesize 2nd Level Science in Scotland's Curriculum for Excellence (CfE).
How do different animals breathe?
Learn how a fish, frog and grasshopper breathe in different ways.
How does a human skeleton work?
Learn how bones and the human skeleton let us move, hold our bodies up and protect our organs. Bitesize 2nd Level Science guide for Scotland's Curriculum for Excellence (CfE).
How do humans maintain temperature and water balance?
Sweating, drinking and the kidneys help keep body temperature and water levels balanced.
How do animals control their body temperature?
Find out how animal behaviour helps them maintain their body temperature.
How do different animals control their body temperature?
Find out how conformers and regulators maintain their body temperature in different ways.
What is inheritance?
Find out why children look like their parents and how we inherit traits.
What is adaptation?
Find out how animals are adapted to their environments with Emmett the explorer.
What is evolution?
Find out about evolution and how living things change over time.
What is the digestive system?
Discover how the food gets into the body, through the digestive system.
What happens to food in your mouth?
Find out how the teeth and tongue help break down food before it is swallowed.
What are the types of teeth?
Find out the functions of different teeth types including canines, incisors and molars.
What happens in your stomach?
Find out about the role that the stomach plays in the digestive system.
What happens in your intestines?
Find out about the role of the small and large intestines in the digestive system.
What is the circulatory system?
Find out how the circulatory system takes oxygen around the body.
What is in your blood?
Discover how blood vessels and blood cells help keep your body working.
What are blood vessels?
Inside every person is an amazing network of blood vessels. Find out how they carry blood around the body.
How does your heart work?
Find out how the heart keeps all the blood in your circulatory system flowing.
Video playlist
Why do we take medicine? Video
An interview with children who need to take asthma medicine regularly.
The human eye and how it works. Video
A look at the human eye and how it works, including models and magnified images.
Muscles needed for movement. Video
How muscles work in pairs to allow for smooth movement.
The heart and how it works. Video
An introduction to the human heart, its location within the body and its work as a pump.
Skeletal muscles. Video
Looking at the role of skeletal muscles in moving parts of the body.
The effects of different drinks on teeth (signed) Video
A series of experiments looking at the effects of different drinks on teeth.
Five types of food. Video
An athlete explains the importance of healthy eating and exercise.
