Cells are the smallest basic unit of structure of living things. Cells are the basic units of function and structure All cells come from other cells.

 Most plants and animals are multicellular.  Yeasts, protists, and bacteria are single- celled.  The structures in an organism from largest to smallest are: organism, organ system, organ, tissues, cells and organelles.  The shape and structure of a cell is related to its function.

 Cells can perform respiration, take in nutrients and produces wastes.  Organelles are the small structures within a cell that do special jobs.  Substances pass in and out of a cell through the cell membrane which all cells have.  Genetic material is contained in the nucleus

 GOLGI BODY: packages proteins before they're sent on to their ultimate destination.  RIBOSOMES: build proteins  VACUOLES: large sacks that store wastes, and transport materials  MITOCHONDRIA: “power” the cell by generating energy  ENDOPLASMIC RETICULUM: Transports proteins through the cell  CHLOROPLASTS: photosynthesize (plants)

The idea that diseases are caused by microscopic organisms, or germs

 Bacteria can be found in the air, soil and in the human body, everywhere  An infectious disease is usually caused by microbes, non-infectious disease can be caused by genetics or the environment (cancer, asthma)  The immune system protects the human body from invading microbes  Washing your hands is the most effective way to prevent spread of infectious disease  Microbes are cultured in a petri dish, in a nutrient rich environment (agar) at the right temperature

Have a nucleus. Largest of the Microbes. Can be killed by antibiotics

No nucleus, only have a Nucleoid without membrane Single-celled organism Bacteria can be found in the air, soil and in the human body. Second largest of the microbes Can be killed by antibiotics

Smallest of the Germs Cannot be killed with Antibiotics Not a cell

 The spread will increase over time  Quarantine is when the infected people are isolated from the community to prevent the spread of infection.  Trade-offs- People lose their freedom

Used to see objects that are not visible with the human eye because they are too small.

 always handle a microscope with two hands by the arm and base, start with the lowest power, turn off the light and turn down the stage when done  Using a higher power objective will cause you to only be able to view a smaller area,it will be harder to find microbes and you may break the slide.  Multiply the eyepiece lens magnification by the objective lens magnification to get the total magnification.  Example: If the eyepiece is 10X and objective lens is 4X then the total magnification is 40X