An explanation of the process of breathing and how blood is transported around the body.
A description, with examples, of the difference between tissues and organs.
Specialised cells in plants are organised into tissues, organs and systems.
An animal cell is built showing the role of the membrane, nucleus and cytoplasm.
The roles of different enzymes in digestion are discussed with an overview of digestion.
An introduction to DNA, the Human Genome Project and genetic screening for diseases.
Sir Alexander Fleming on how he discovered the world's first antibiotic, penicillin.
Gaseous exchange in the lungs and the important role played by the alveoli is explained.
We have a selection of learner guides