Micro Life

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• 1. infectious – disease caused by germs, such as bacteria.

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• 2. noninfectious – disease caused by genes, the environment, lifestyle or a combination of these factors.

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• 3. contagious – a disease that will spread by contact.

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• 4. carrier – a person who is contagious but never develops symptoms of the disease or develops the disease only after a lengthy period of time.

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• 5. epidemiologist – scientists who trace the spread of disease through a population.

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• 6.quarantine – an enforced isolation to prevent a disease from spreading.

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• 7. vector – an organism that spreads disease causing germs to humans usually without getting sick itself.

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• 8. field of view – area you see when looking through the eyepiece of a microscope.

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• 9. magnify/magnification – to make larger.

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• 10. microbe – organisms too small to be seen with the human eye.

11. disease- a breakdown in the structure and function of a living organism.

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• 12. cell – basic unit of structure and function in living things.

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• 13. cell theory – the theory that all living things are made of cells, all cells come from other cells and cells contain hereditary information.

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• 14. germ theory of disease – this theory proposes that an infectious disease is caused by microbes, which can be spread by people.

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• 15. multi-cellular – having more than one cell.

• 16. cell membrane – thin, flexible envelope that surrounds the cell.

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• 17. cytoplasm – jelly like material between the cell membrane and the nucleus.

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• 18. nuclear membrane – separates the nucleus from the rest of the cell.

• 19. nucleus – cell structure that directs all the activities of the cell.

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• 20. organelles – “tiny organs” that make up the cell.

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• 21. respiration – when an organism breaks down sugar and releases carbon dioxide in its cells or the breakdown of nutrients to produce energy and carbon dioxide in the cells.

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• 22. bacteria – a single cell microbe without nucleus.

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• 23. protist – usually a single celled microbe with a nucleus.

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• 24. virus – is not classified as an organism because they are not free living cells. Made up of two parts – the capsid and nucleic acid.