Physical and mental health

Health is a state of physical and mental well-being.
Causes of ill health include communicable disease (can pass from one organism to another), non-communicable disease (cannot pass from one organism to another, diet, stress, and life circumstances.
Different types of disease may interact. For instance, defects in the immune system may mean an individual is more likely to suffer from infectious diseases, and immune reactions caused by a pathogen can trigger allergies, such as skin rashes and asthma.
Severe physical ill health can lead to mental illnesses, such as depression.

Sign up to unlock the rest of this topic — plus every other topic, video, flashcard set and eBook guide in your SnapRevise+ subscription.

Cancel anytime — instant access the moment you sign up.