Health and disease
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Health and Disease. Year 10 Units 4.1 & 4.2. Health. Good Nutrition Mental Health Exercise. Disease. An abnormal condition of an organism which interrupts the normal bodily functions that often leads to feeling of pain and weakness, and usually associated with symptoms and signs. .

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Health and Disease

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Health and disease

Health and Disease

Year 10

Units 4.1 & 4.2


Health

Health

  • Good Nutrition

  • Mental Health

  • Exercise


Disease

Disease

  • An abnormal condition of an organism which interrupts the normal bodily functions that often leads to feeling of pain and weakness, and usually associated with symptoms and signs.


Disease1

Disease

  • Organism: Living things that are capable of reacting to stimuli, reproduction, growth, and homeostasis.[origin: Gk. organismos, from An. Gk. organon , “organ, instrument, tool”]

  • Micro-organism: An organism that is microscopic or submicroscopic, which means it is too small to be seen by the unaided human eye. [origin: Gk. mīkrós “small”]


Disease2

Disease

  • Agent: Any power, principle or substance capable of producing an effect, whether physical, chemical or biological. [Origin: L. Agens = acting]

  • Pathogen: An agent causing disease or illness to its host, such as an organism or infectious particle capable of producing a disease in another organism. [origin: from Gk. pathos, suffering/emotion, and gene, to give birth to.]


Disease3

Disease

  • Host: An organism that is infected with or is fed upon by a parasitic or pathogenicorganism An animal or plant that nourishes and supports a parasite; the hostdoes not benefit and is often harmed by the association.

  • Vector: An organism that transmits the agent or pathogen-causing organism from the reservoir to the host. [origin: L. vehere, “carrier”.]


Disease4

Disease

  • Parasite: An organism that obtains nourishment and shelter on another organism. [origin: L. parasitus from Gk. parasitos “person who eats at the table of another”]

  • Infection: invasion and multiplication of microorganisms in body tissues.


Disease5

Disease

  • Infectious: Capable of being transmitted by infection, with or without actual contact.

  • Virulence: The degree or ability of a pathogenicorganism to cause disease.


Distribution of a disease

Distribution of a disease

  • Endemic: a disease or agentpresent or usually prevalent in a population or geographical area at all times. [origin: Gk. Endemos, “dwelling in a place”]

  • Epidemic: Occurring in numbers clearly in excess of normal expectancy. [origin Gk. Epidemios, “prevalent”]


Distribution of a disease1

Distribution of a disease

  • Outbreak: The occurrence of a large number of cases of a disease in a short period of time.

  • Pandemic: An epidemic that affects a wide geographic area.


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