Diet and Excersise- A balanced diet includes everything needed to keep the body healthy. Different people need different amounts of energy because the metabolic rate varies from person to person.
Weight promblems- If you eat more food (take in more energy) than you need your mass will increase. Obesity can lead to health promblems such as Type 2 diabetes.
Inheritance, excersise and health- Inherited factors affect our health. These include metabolic rate and cholesterol levels. People who excersise regulery are usually healthier than those who take little excersise.
Pathogens and Disease- Pathogens are microorganisms that cause infectious disease. Most pathogens are bacteria or viruses. Pathogens reproduce rapidly inside the body and may produce toxins. Viruses reproduce inside cells and damage them.
Defence Mechanisms- The body prevents most pathogens getting in. Pathogens which enter the body can be destoyed by white blood cells.
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