Breathing and circulation

An explanation of the process of breathing and how blood is transported around the body.

Cells, tissues and organs

A description, with examples, of the difference between tissues and organs.

Cells, tissues and organs in plants

Specialised cells in plants are organised into tissues, organs and systems.

Components of an animal cell

An animal cell is built showing the role of the membrane, nucleus and cytoplasm.

Coronary heart disease

The symptoms and causes of coronary heart disease.

Digestive enzymes

The roles of different enzymes in digestion are discussed with an overview of digestion.

DNA and the Human Genome Project

An introduction to DNA, the Human Genome Project and genetic screening for diseases.

Exercising in space

Exercising is important whilst living in space to maintain good health.

Fleming and the discovery of penicillin

Sir Alexander Fleming on how he discovered the world's first antibiotic, penicillin.

Gaseous exchange in the lungs and the importance of alveoli

Gaseous exchange in the lungs and the important role played by the alveoli is explained.

5 learner guides

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