You are viewing a free preview of this lesson.
Subscribe to unlock all 10 lessons in this course and every other course on LearningBro.
Coronary heart disease (CHD) is one of the leading causes of death in the UK. This lesson covers the causes, effects and treatments of CHD, as well as the broader concept of health and the link between lifestyle and non-communicable diseases, as required by the AQA GCSE Combined Science Trilogy specification (8464).
The World Health Organisation (WHO) defines health as:
"A state of complete physical, mental and social well-being and not merely the absence of disease or infirmity."
This means health is more than just "not being ill" — it includes mental health and social well-being too.
| Type | Definition | Examples |
|---|---|---|
| Communicable | Caused by pathogens (bacteria, viruses, fungi, protists) and can be spread from person to person | Influenza, tuberculosis, HIV, malaria |
| Non-communicable | NOT caused by pathogens and CANNOT be spread between people | Coronary heart disease, cancer, type 2 diabetes, liver disease |
Exam Tip: Non-communicable diseases are often linked to lifestyle factors such as diet, smoking, alcohol consumption and lack of exercise. These are sometimes called "lifestyle diseases."
Subscribe to continue reading
Get full access to this lesson and all 10 lessons in this course.