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https://goo.gl/gHQcwz to unlock the full GCSE Biology Combined Science videos series for the new 9-1 OCR, AQA and Edexcel specifications. • They key points covered in this video include: • 1. Health • 2. Disease • 3. Communicable Diseases • 4. Non-communicable Diseases • Health • The difference between health and disease is not as simple as you may think - health is not just the absence of disease. The definition for health given by the World Health Organisation (WHO) is: Health is the state of complete physical, mental and social well-being, not merely the absence of disease or infirmity • Disease • A disease is a condition that stops any part of the body from functioning properly. Diseases are a major causes of ill health (other factors which affect health include diet and stress) It is important to remember the term disease can also be used for mental illness (i.e. depression is a mental health disease). There are two main categories of disease - communicable diseases and non-communicable diseases. • Communicable Diseases • When diseases can spread between organisms, we call them communicable diseases (sometimes also called contagious or infectious diseases). Examples include tuberculosis, malaria, HIV, chlamydia etc. • Non-communicable Diseases • Diseases that cannot be spread between people or animals are called non-communicable diseases. Often they are diseases that progressively get worse over a long period of time. Examples include asthma, cancer and coronary artery disease. They can be caused by several things including a poor diet, genes or uncontrollable cell division. • Summary • 1. Health is the state of complete physical, mental and social well-being, not merely the absence of disease or infirmity • 2. A disease is a condition that can result from any part of the body not functioning properly, including the brain • 3. Communicable diseases are ones that can be spread between individuals • 4. On the other hand, non-communicable diseases cannot be spread between individuals
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